Notice that :

① Figure number and the number of white rectangles in the figure are always the same.

②Number of dark rectangles is always twice of the number of white rectangles in each figure.

③Number of stars is always one more than number of dark rectangles in each figure.

So if you let number of white rectangles be 1 unit,

Then ,
dark rectangles = 2 units
Stars = 2 units + 1

Total = 1 unit + 2 units + 2 units + 1
= 5 units + 1



5 units + 1 = 621
5 units = 620

1 unit = 124

So the figure number is 124 since 1 unit is the number of white rectangles

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