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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

If I saved 1p on the 1st January, 2p on the 2nd, 4p on the 3rd, 8p on the 4th, and so on, how much money would I have saved by the end of the month of January? Answer in pounds.

Answer: £21,474,836.47


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