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Sixty-three (Posted on 2024-06-27)

Find an expression that equals 63 using the digits 1, 7, 8, and 9.

Each digit must be used exactly once. You must use only addition, subtraction, multiplication, and division.

Digits may not be concatenated (one may not put 1 and 4 together to make 14). Parentheses (brackets) are allowed.

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

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Solution

Comment 2 of 2 |

Get rid of the obviously dumb brute force programs and just be clever.

63 = 7/(1-8/9) or 63=9/(8/7-1)

Posted by Brian Smith on 2024-06-28 11:06:19

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