Daily Math Challenge

Sharpen your math skills with a new problem every Tuesday to Friday. These daily challenges are perfect for those who enjoy quick, engaging puzzles.

Problem 1101

Posted: March 8, 2024

Another new mathematical operation has been created to drive you crazy. The symbol is ::

Given that

1 :: 1 = 1
2 :: 3 = 5
5 :: 4 = 1
8 :: 3 = -7
10 :: 7 = -11
12 :: 5 = -23

Find the value of 15 :: -12

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