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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
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 |
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