Trivia

Subject:
Friday Puzzler -- a little origami

Alex Y
To challenge yourself, try this one without actually folding any paper!

You are given a square piece of paper with area that is a two digit number of square inches. Now fold it, so that the lower right corner comes to the center of the top edge. When you unfold it and measure the crease line, you discover that it is an even number of inches long.

How long is the crease line?

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