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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.

On a calculator if you are allowed to use the \"4\" key and any of the add, take, multiply, divide and equals keys as many times as you like, what is the fewest number of presses needed to make 9 on the calculator? Set yourselves other targets and see how few presses are needed.

Answer: 4÷4+4+4