Brain Teasers
Area of a Square
You have a piece of paper, 10cm by 10cm. Area = 100cm^2. For some reason, you need a square piece of paper with an area of 50cm^2. Using the paper you have, what's an easy way of getting the new square?
Hint
Try it with a piece of paper, doesn't matter the size of the square, try to find a square half its size inside it.Answer
Fold the four corners of the square into the centre. This doubles the thickness of the paper, and so halves the area.Hide Hint Show Hint Hide Answer Show Answer
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