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Puzzle of the Day

These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.

Write the numbers :- 3, 4, 5, 6, 10, 12, 13, 15 in a different order, so that numbers next to each other add to give square numbers. (You make a square number when you multiply something by itself, so 49 is square because it is 7 times 7)

Answer: 3, 6, 4, 5, 12, 13, 10, 15