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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.

If you had a set of ten cards numbered 0 to 9, could you make six numbers which are all multiples of three? (This means numbers like 3, 6, 78, 105 etc. which are something multiplied by three.)

Answer: 6, 9, 12, 30, 45, 78 or 3, 6, 9, 24, 78, 105