1. The product of two odd numbers is 15.
What are they?
2. The difference between two square numbers is 15.
What are they?
3. The sum of three prime numbers is 33.
What are they?
4. The ratio of two even numbers is 11:4.
What are they?
Topics: Starter  Arithmetic  Number  Puzzles  Ratio
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1. 1 and 15 or 3 and 5 (and their negatives).
2. 1 and 16 or 49 and 64. Could there be any other solutions?
3. 2, 2 and 29 or 3, 7 and 23 or 3, 11 and 19 or 3, 13 and 17 or 5, 5 and 23 or 5, 11 and 17 or 7, 7 and 19 or 7, 13 and 13 or 11, 11 and 11.
4. 22 and 8 or 44 and 16 or 66 and 24 or ...
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