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Square Grid

Age 11 to 14 Short
Challenge Level

A square is split into a 100 by 100 square grid.

100 squares in the first row are shaded, 99 in the second row, 98 in the third row, and so on.

What fraction of the whole square is shaded?

This problem is taken from the World Mathematics Championships
You can find more short problems, arranged by curriculum topic, in our short problems collection.