Developing a Mensa Mind: 15 Steps to Building a Better Brain

•

2 likes•1,263 views

Explore fifteen tips (and a bonus) for how to improve brain health and function. Be sure to download the accompanying handout for resources and specific tips. Find the handout here http://bit.ly/mmhandout.

Health & Medicine Technology

Developing a Mensa Mind:

15 Steps to
Building a
Better Brain

6. Stop trying to do
two things at once.

credits
•
•
•
•

Athena statue: Museumsklubben Tegners Venner
Rest of images: morguefile.com
Medial temporal gyrus: wikimedia commons
Lindt chocolate: Lindt

Recently uploaded

Top Rated Bangalore Call Girls Ramamurthy Nagar ⟟ 9332606886 ⟟ Call Me For Genuine Sex Service At Affordable Rate Booking Contact Details Whatsapp Chat :+91- 9332606886 These professional and Call girls in Bangalore can satisfy your every desire - be it sensual massage or an erotic shower, they are always more than willing to meet them. Furthermore, they pay close attention to body language cues to ensure you enjoy every minute spent in their company - both in-call and outcall services are offered. Is an excellent choice for anyone seeking an exciting and thrilling night of fun and excitement The Oberoi, Bengaluru Taj West End The Leela Palace Bengaluru JW Marriott Hotel Bengaluru The Ritz-Carlton, Bangalore Sheraton Grand Bangalore Hotel at Brigade Gateway Conrad Bengaluru ITC Gardenia, Bengaluru Renaissance Bengaluru Race Course Hotel The Lalit Ashok Bangalore 30 apr 24 (LK)

Top Rated Bangalore Call Girls Ramamurthy Nagar ⟟ 9332606886 ⟟ Call Me For G...

narwatsonia7

Premium Call Girls Cottonpet Whatsapp 7001035870 Independent Escort Service Booking Contact Details Whatsapp Chat :+91-7001035870 These professional and Call girls in Bangalore can satisfy your every desire - be it sensual massage or an erotic shower, they are always more than willing to meet them. Furthermore, they pay close attention to body language cues to ensure you enjoy every minute spent in their company - both in-call and outcall services are offered. Is an excellent choice for anyone seeking an exciting and thrilling night of fun and excitement The Oberoi, Bengaluru Taj West End The Leela Palace Bengaluru JW Marriott Hotel Bengaluru The Ritz-Carlton, Bangalore Sheraton Grand Bangalore Hotel at Brigade Gateway Conrad Bengaluru ITC Gardenia, Bengaluru Renaissance Bengaluru Race Course Hotel The Lalit Ashok Bangalore 29 apr 24 (LK)

Premium Call Girls Cottonpet Whatsapp 7001035870 Independent Escort Service

vidya singh

Call Girls Ludhiana Just Call 9907093804 Top Class Call Girl Service Available Call Girls Ludhiana Just Call 9907093804 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Ludhiana Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Ludhiana Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Ludhiana Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Ludhiana Just Call 9907093804 Top Class Call Girl Service Available

Dipal Arora

Call Girls Faridabad Just Call 9907093804 Top Class Call Girl Service Available Call Girls Faridabad Just Call 9907093804 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Faridabad Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Faridabad Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Faridabad Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Faridabad Just Call 9907093804 Top Class Call Girl Service Available

Dipal Arora

(👑VVIP ISHAAN ) Russian Call Girls Service Navi Mumbai🖕9920874524🖕Independent CALL GIRLS Available for Sex Shot FULL Night Navi Mumbai ESCORTS Booking Contact Details WhatsApp Chat: +91-9920874524 24/7 Hotel service is offered 💐 every region in the VIP star category Genuine service with regular price guarantees and happiness for hotel outcall and incall services High-end Escorts Hi-fi foreigners model best n real service call; Russian new model actress Airhostess sexy girls uncovered service with AC rooms 5 star category Hotels call n Whatsapp Local college girls cheap escorts VIP Callgirl High class models from North and South India, college girls, housewives, body to body massage, sandwich massage, shower bathers, blow job painters, licking, front and rear shooters, smooching, rubbing, and more... ENDLESS FUN ✔ Full on escorts Service by High Profile ✔✔ Top North Indian Models ✔✔ Air-Hostess ✔✔ Foreigner,Russian ✔✔ College Girls ✔✔ Students ✔✔ Corporate Ladies ✔✔ MBA Students and Much More.... Our Services 🙏🙏🙏🙏🙏

(👑VVIP ISHAAN ) Russian Call Girls Service Navi Mumbai🖕9920874524🖕Independent...

Taniya Sharma

Russian Escorts Girls Nehru Place ZINATHI 🔝9711199012 ☪ 24/7 Call Girls Delhi { J R P} 27-04-2024 Delhi Call Girls Service provide for both you and your partner.📞📞 🔝9711199012 You will be offered varied sex positions and techniques. Your location call girl will fulfil all your sexual fantasies. She will also accommodate other erotic requests, including sex-related ones. The result will be an unforgettable experience. You should always remember that it takes time to master new erotic pleasure. But perseverance pays off! OUR SERVICES RATE: – let you know the our Call girls price in Delhi are very affordable and Best rate in genuine market of Call girls. But as all you knows that Quality has comes with its own Price tag. We provide -Anal Sex,Sex without Condom, Girlfriend tour, Oral sex, Exciting body massage Anal, Blowjob, Handjob, Kissing ,(French kiss also) Flexibility, Choices and options, Lists of many beauty fantasies, Turn your dream into reality, Perfect companionship, Cheap and convenient, In-call and Out-call services, And many more., One Shot — 5000/in call (time 1 hour), 6000/out call Two shot with one girl — 8000/in call (time 2 hour), 10000/out call Body to body massage with sex- 8000/in call (time 1 hour) Full night Service for one person– 12000/in call, 13000/out call (shot limit 3-4 shots) "T" Vip Call Girls {[ Delhi ]}✌️Independent Escort Models 💕 Hot Model's ➡️ Parul Desai 📞📞 "Delhi"Call Girls In India's Finest Models Rate 9999/- "B" Call Girls Delhi ✌️Independent Escort Service 💕 Hot Model's ➡️ High Profile Call Girls Dhaula Kuan Delhi Maya ➡️ 💋Independent Escort📞 🌍Hot Fantasy🌍 Hot Models Call Girls Shankar Vihar Delhi" 🚀 Delhi Escorts ꧁❤ ❤꧂ ☎️ Hard And Sexy Vip Call Dolly ➡️ Vip Call Girls In CGO Complex Delhi ❤️ No Advance Payments ➡️ ❤️ 😘 DATY (Dinner At The Y)

Russian Escorts Girls Nehru Place ZINATHI 🔝9711199012 ☪ 24/7 Call Girls Delhi

AlinaDevecerski

Call Girls Nagpur Just Call 9907093804 Top Class Call Girl Service Available Call Girls Nagpur Just Call 9907093804 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Nagpur Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Nagpur Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Nagpur Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Nagpur Just Call 9907093804 Top Class Call Girl Service Available

Dipal Arora

All Time Service Available Call Girls Marine Drive 📳 9820252231 For 18+ VIP Call Girl At Their Home & Hotels Booking Contact Details WhatsApp Chat: +91-9820252231 Mumbai Escort Service includes providing maximum physical satisfaction to their clients as well as engaging conversation that keeps your time enjoyable and entertaining. Plus they look fabulously elegant; making an impressionable. Independent Escorts Mumbai understands the value of confidentiality and discretion - they will go the extra mile to meet your needs. Simply contact them via text messaging or through their online profiles; they'd be more than delighted to accommodate any request or arrange a romantic date or fun-filled night together. We provide - Flexibility Choices and options Lists of many beauty fantasies Turn your dream into reality Perfect companionship Cheap and convenient In-call and Out-call services And many more. 01-05-24 (Smt)

All Time Service Available Call Girls Marine Drive 📳 9820252231 For 18+ VIP C...

Arohi Goyal

Call Girls Kochi Just Call 8250077686 Top Class Call Girl Service Available Call Girls Kochi Just Call 8250077686 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Kochi Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Kochi Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Kochi Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Kochi Just Call 8250077686 Top Class Call Girl Service Available

Dipal Arora

Call Girls Dehradun Just Call 9907093804 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Dehradun Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Dehradun Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Dehradun Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Dehradun Just Call 9907093804 Top Class Call Girl Service Available

Dipal Arora

Call Girls Jabalpur Just Call 8250077686 Top Class Call Girl Service Available Call Girls Jabalpur Just Call 8250077686 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Jabalpur Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Jabalpur Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Jabalpur Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Jabalpur Just Call 8250077686 Top Class Call Girl Service Available

Dipal Arora

Premium Bangalore Call Girls Jigani Dail 6378878445 Escort Service For Hot Massage and Pleasant Why you Choose Us- +91-6378878445 Bangalore Escort Service includes providing maximum physical satisfaction to their clients as well as engaging conversation that keeps your time enjoyable and entertaining. Plus they look fabulously elegant; making an impressionable I Have Extremely Beautiful Broad Minded Cute Sexy & Hot Call Girls and Escorts, We Are Located in 3* 4* 5* Hotels. Safe & Secure High Class Services Affordable Rate 100% Satisfaction, Unlimited Enjoyment. Any Time for Model/Teens Escort in Delhi High class luxury and premium escorts agency. CALL US High Class Luxury and Premium Escort Service We Provide Well Educated,Royal Class Female,High-Class Escort Service Offering a Top High Class Escort Service In The & Several Nearby All Places of $L16

Premium Bangalore Call Girls Jigani Dail 6378878445 Escort Service For Hot Ma...

tanya dube

EXPLORE THE BEST ESCORT SERVICE IN HARIDWAR These days people are very engaged with their hectic life timetable. Some are busy with the stress and hectic schedule in the office, while others have a partner but don't feel the same excitement as before. But don't worry; our sexy escort service in Haridwar is here to bring excitement back to your life. Luxury Escort Service is the best place to get some busty, sizzling, hot escorts who can help you relish all the moments and make the night unforgettable. We are one of the faithful escort agencies in Haridwar that provide escort services in Haridwar to the customers in the best practices. We apprehend that you need somebody who can listen to you and share some quality time with you, not being judgemental. Your privacy and hesitation are understandable while booking the Escort, but you can trust us as we have many clients who reach out to us repeatedly. You are at the right place if you are searching for a trustworthy and cheap escort service in Haridwar. Luxury Escort Service in Haridwar is the best place to get some seductive and hot escort girls service who can help you enjoy all the moments and make the night even more special. Vast numbers of independent escorts are working across Haridwar all day and night to make their clients happy as never before. If you feel so alone or get disheartened from the hectic life schedules, then nothing is better than having a mate who can give you a token of new love. Don't Worry, Guys; we are here for you. We are a highly demanded Luxury Escort Service in Haridwar that provides all types of escort services. We have top Haridwar models in Haridwar, highly sexy housewives in Haridwar, hot college girls in Haridwar, and beautiful independent escort girls in Haridwar to serve you with a sensual time that is matchless to all your unique experiences in life. Many escort agencies in Haridwar provide escort services in the market, but we have been operating in the industry for eight years to till date. We served Our Independent Escort Service to approximately 10000+ satisfied clients in Haridwar. Unlike other escort service companies in Haridwar, we give the client to mention their requirements and desires to cater to them with the best escort service in Haridwar.

College Call Girls in Haridwar 9667172968 Short 4000 Night 10000 Best call gi...

perfect solution

💎VVIP Kolkata Call Girls Parganas🩱7001035870🩱Independent Girl ( Ac Rooms Available ) Full Fun With Sex Booking Contact Details WhatsApp Chat: +91-7001035870 Escort Service in Kolkata | 369+ call girls book @₹6k-₹18k/full night cash Hi, I am Taniya Sharma. My age is 25 year old , an independent call girl in Kolkata. I love sex and I'm the only girl in your city that can satisfy you completely. I also provide this service at a very low rate.No Advance Payment Genuine Low Price Kolkata Cash Payment Fully Medically Fit & Competent Girl I am. Book Your GF | FOR BOOKING CALL Our All Services 1 ) ★ (Oral to consummation) bjnonCovered 2 ) ★ Special Massage 3 ) ★ O-Level (Oral sex) 4 ) ★ Blow Job; 5 ) ★ COB (Come On Body) 6 ) ★. Extraball (Have sex ordinarily) 7 ) ★ A-Level (5 star escort) 8 ) ★ Strip-bother 9 ) ★ BBBJ (Bareback Blowjob) 10 ) ★ Spending time in my rooms 11 ) ★ BJ (Blowjob Without a Condom) 12 ) ★ COF (Come On Face) 13 ) ★ Completion

💎VVIP Kolkata Call Girls Parganas🩱7001035870🩱Independent Girl ( Ac Rooms Avai...

Taniya Sharma

Call Girls Siliguri Just Call 8250077686 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Siliguri Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Siliguri Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Siliguri Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Siliguri Just Call 8250077686 Top Class Call Girl Service Available

Dipal Arora

Call Girls Aurangabad Just Call 8250077686 Top Class Call Girl Service Available Call Girls Aurangabad Just Call 8250077686 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Aurangabad Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Aurangabad Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Aurangabad Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Aurangabad Just Call 8250077686 Top Class Call Girl Service Available

Dipal Arora

Bangalore Call Girls Nelamangala Number 9332606886 Meetin With Bangalore Escorts Booking Contact Details Whatsapp Chat :+91-9332606886 These professional and Call girls in Bangalore can satisfy your every desire - be it sensual massage or an erotic shower, they are always more than willing to meet them. Furthermore, they pay close attention to body language cues to ensure you enjoy every minute spent in their company - both in-call and outcall services are offered. Is an excellent choice for anyone seeking an exciting and thrilling night of fun and excitement The Oberoi, Bengaluru Taj West End The Leela Palace Bengaluru JW Marriott Hotel Bengaluru The Ritz-Carlton, Bangalore Sheraton Grand Bangalore Hotel at Brigade Gateway Conrad Bengaluru ITC Gardenia, Bengaluru Renaissance Bengaluru Race Course Hotel The Lalit Ashok Bangalore 27 apr 24 (LK)

Bangalore Call Girls Nelamangala Number 9332606886 Meetin With Bangalore Esc...

narwatsonia7

Call Girls Haridwar Just Call 8250077686 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Haridwar Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Haridwar Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Haridwar Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Haridwar Just Call 8250077686 Top Class Call Girl Service Available

Dipal Arora

Call Girls Ooty Just Call 8250077686 Top Class Call Girl Service Available Easy & Fast Booking Procedure Of Ooty Escorts Call girls are ready and waiting to provide the quality essentialness that will help ease away life's tensions Ooty Escorts are regular companions of elite gentlemen and can take them places they could only dream of visiting. These ladies take great care in maintaining themselves to look appealing; visiting salons and spas regularly keeps them looking their best; their portfolios can be found online via an escort’s agency website. EXCITING OPTIONS AVAILABLE AT OUR INDEPENDENT ESCORTS Candlelight dinner Evening date Night clubs or parties Hotels or your flats Business trip Business party Stripping party Ooty Escort Service are adept at performing wild anal sex, deep throat sex and cum eating - perfect for satisfying all your sexual needs and playing any game imaginable. Affordable professional assistants are readily available and ready to assist with any situation - be it romantic date or solo night. Their beautiful appearances and striking personalities will leave you speechless, while they can accompany you to restaurants or bars where their presence will surely leave an impression.

Call Girls Ooty Just Call 8250077686 Top Class Call Girl Service Available

Dipal Arora

Night 7k to 12k Chennai City Center Call Girls 👉👉 7427069034⭐⭐ 100% Genuine Escort Service & Hotel Service Available Call Mr Chirag Ji +91-7427069034 We offer all types of girls of your choice with space. Our escorts are fully cooperative and understand your needs. All types of call girls like Housewives, College girls, Russian girls, Muslim girls, Afghani girls, Bengali girls, Working girls, south Indian girls, Punjabi girls, etc. In-Call: — You Can Reach At Our Place in Chennai Our place Which Is Very Clean Hygienic 100% safe Accommodation. Out-Call: — Service for Out Call You have To Come Pick The Girl From My Place We Also Provide Door-Step Services Hygienic: — Full Ac Neat And Clean Rooms Available In Hotel 24 * 7 Hrs In Chennai C010524HD Our Services and Rates: – One Shot — 2500/in call (time ½ hour), 5000/out call Two shot with one girl — 5000/in call (time 1 hour), 6000/out call Body to body massage with sex- 3000/in call (time 1 hour) full night for one person– 8000/in call, 10000/out call (shot limit 4 shot) We are available 24*7 all days of the year Call us — 7427069034 !! Thank you for Visiting.

Night 7k to 12k Chennai City Center Call Girls 👉👉 7427069034⭐⭐ 100% Genuine E...

hotbabesbook

Recently uploaded (20)