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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.The Association of Teachers of Mathematics

Multiply together any four consecutive numbers (for instance 7,8,9,10) then add one. You should be able to find a number which when you multiply it by itself gives this same answer. Does this always work?

Answer: 71x71 = 5041. Yes

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