1. The product of two odd numbers is 207.
What are they?
2. The difference between two square numbers is 5.
What are they?
3. The sum of three prime numbers is 21.
What are they?
4. The ratio of two even numbers is 11:2.
What are they?
Topics: Starter  Arithmetic  Number  Puzzles  Ratio
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1. 1 and 207 or 3 and 69 or 9 and 23 (and their negatives).
2. 4 and 9. Could there be any other solutions?
3. 2, 2 and 17 or 3, 5 and 13 or 3, 7 and 11 or 5, 5 and 11 or 7, 7 and 7.
4. 22 and 4 or 44 and 8 or 66 and 12 or ...
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