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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.

Find the number that when added to its reverse is closest to 50. Try this for 100, 150, 200, 250. For instance 122+221 is the closest to 350.

Answer: 14+41 or 23+32, 18+81 or 27+72 or 36+63 or 45+54, 59+95 or 68+86 or 77+77, 99+99, 121+121