Can You Solve this 7 = 42 | 6 = 30 | 5 = 20 | 3 = ?

Question:

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

Option:

A. 6

B. 8

C. 2

D. 4

Solution:

7 = 42
= 7 x 7 = 49
49 – 7 = 42

6 = 30
= 6 x 6 = 36
36 – 6 = 30

5 = 20
= 5 x 5 = 25
25 – 5 = 20

Therefore,
3 = 6
= 3 x 3 = 9
9 – 3 = 6

Answer: A. 6