1. The product of two odd numbers is 195.
What are they?
2. The difference between two square numbers is 21.
What are they?
3. The sum of three prime numbers is 31.
What are they?
4. The ratio of two even numbers is 11:6.
What are they?
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Topics: Starter  Arithmetic  Number  Puzzles  Ratio
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Previous Day  This starter is for 4 June  Next Day
1. 1 and 195 or 3 and 65 or 5 and 39 or 13 and 15 (and their negatives).
2. 4 and 25 or 100 and 121. Could there be any other solutions?
3. 3, 5 and 23 or 3, 11 and 17 or 5, 7 and 19 or 5, 13 and 13 or 7, 7 and 17 or 7, 11 and 13.
4. 22 and 12 or 44 and 24 or 66 and 36 or ...
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