Integer multiplication puzzles

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?

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