Sim

1. David Radcliffe
dradcliffe@gmail.com

2. Instructions
Write an integer inside each circle so that the
number on each line is the product of the two
numbers at the endpoints.
–35
5 –7

3. –20 40
–30
24 –48
18
12 –27

4. –5
–20 40
–30
24 –48
4 6 –8
18
12 –24
3

5. 120 – 150
–180
–96 120
108
– 72 90

6. –15
120 – 150
–180
–96 12 120
–8 10
108
– 72 90
9

7. 100
240 –90
–144 216

8. 100
–20 –5
240 –90
–12 18
–144 216
12

9. If you like this idea, why not create
your own puzzles and share them
with others?