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Answer: **F**

Each square is made up of **9 smaller grey squares**.

In each **row** of 3, if we add the red shapes together all 9 of the smaller squares are filled.

Looking at the bottom row, the first two red shapes use all of the smaller grey squares, except the centre one. The answer with a single small red square in the centre is **F**.

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Make money from home during lockdown. Average payout is around £200.