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Four Fours

Problem

Using exactly four fours and the simple rules of arithmetic, express all of the integers from 1 to 25.

For example, 1 =
4
4
+ 4 – 4, 2 =
4
4
+
4
4
and 3 =
4 + 4 + 4
4
Problem ID: 14 (Sep 2000)     Difficulty: 1 Star

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