1. The product of two odd numbers is 85.
What are they?
2. The difference between two square numbers is 5.
What are they?
3. The sum of three prime numbers is 25.
What are they?
4. The ratio of two even numbers is 9:1.
What are they?
Topics: Starter  Arithmetic  Number  Puzzles  Ratio
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1. 1 and 85 or 5 and 17 (and their negatives).
2. 4 and 9. Could there be any other solutions?
3. 3, 3 and 19 or 3, 5 and 17 or 3, 11 and 11 or 5, 7 and 13 or 7, 7 and 11.
4. 18 and 2 or 36 and 4 or 54 and 6 or ...
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