Question

7 = 42
6 = 30
5 = 20
3 = ??????

Answer 1

Answer:

7*(7-1), 6*(6-1), 5*(5-1),

so, 3*(3-1)= 6

Explanation:

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Answer 2

Answer:

as 7 x 6 =42 one number is less in every digit so 3 = 6