The document provides instructions for filling in circles with integers so that the numbers on each line are the product of the two numbers at the endpoints. It then shows an example of a completed grid with 3 lines of circles containing numbers that satisfy the instructions. It concludes by suggesting creating your own puzzles to share with others.

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?