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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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Proposed solution

| Comment 1 of 2

Running a program to solve this found no solution.

However, turning the 9 upside down to be a 6 led to many possibilities including 7,8*,6+,1+ in RPN, or 7*8+6+1 in algebra raic form.

Posted by Charlie on 2024-06-28 00:01:16

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