1. The product of two odd numbers is 209.
What are they?
2. The difference between two square numbers is 9.
What are they?
3. The sum of three prime numbers is 27.
What are they?
4. The ratio of two even numbers is 9:5.
What are they?
Topics: Starter  Arithmetic  Number  Puzzles  Ratio
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1. 1 and 209 or 11 and 19 (and their negatives).
2. 16 and 25. Could there be any other solutions?
3. 2, 2 and 23 or 3, 5 and 19 or 3, 7 and 17 or 3, 11 and 13 or 5, 5 and 17 or 5, 11 and 11 or 7, 7 and 13.
4. 18 and 10 or 36 and 20 or 54 and 30 or ...
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