# Visual Maths: How many squares can fit in a matrix?

**Puzzle**: Consider you have squares of different sizes 1cm, 2cm, 3cm, 4cm and 5cm. How many minimum number of squares can be used to cover 7 x 7 matrix?

The most common answer that you will end up easily by trying different combinations of squares is 10. However, there are less than 10 squares that can fit it. Here’s the solution for it:

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