Logic Checkers

This math trick isn't strongly related to numbers... Or is it? Mostly, it's about logic but it has something to do with even numbers vs. odd numbers.

The tilde (~) represents the negation function in logic. When you use the word not in a sentence, you are using the negation function. It flips the truth value of a statement. For example, since the statement "15 is divisible by 5" is true, its negation "15 is not divisible by 5" is false.

An odd number of nots gives false on the top row & true on the bottom row, but an even number of nots gives vice versa!

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© Derek Cumberbatch