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If 2=0, 3=3, 4=8, 5=15, then 8 = ?

If 2=0, 3=3, 4=8, 5=15, then 8 = ?

Explanation

2 x 0 = 0

3 × 1 = 3

4 × 2 = 8

5 × 3 = 15

8 × 4 = 32

ND5-07-2023