### 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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