16 = 4*4 = 4 + 4 + 4 + 4, Area and Perimeter of a square of side length 4
16 = 6 + 10 = 1 + 15 Sum of 2 triangular numbers
16 = 4 × 4 + 4 − 4 = (44 − 4) ×.4
4X4 Magic square
12 13 1 8
6 3 15 10
7 2 14 11
9 16 4 5
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