Context for question 16
These are the first four diagrams in a sequence. The diagrams are made using grey squares and white squares.
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| diagram | 1 | 2 | 3 | 4 | n |
|---|---|---|---|---|---|
| number of grey squares | 2 | 4 | 6 | ||
| number of white squares | 0 | 2 | 6 | ||
| total number of squares | 2 | 6 | 12 |