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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.

Three different numbers written on cards are placed side by side. The first and the second add up to 15. The second and third add up to 17. No card is a 7, or is higher than 9. Write down the 3 numbers in order.

Answer: 6, 9, 8