This bheja fry question I read on the Internet.
If 1^2 = 2
2^2 = 6
3^2 = 12
4^2 = ??
Answer
These type of questions follow a certain pattern.
We can write 1^2 = 1^2 + 1 = 2
2^2 = 2^2 + 2 = 4 + 2 = 6
3^2 = 3 ^2 + 3 = 9 + 3 = 12
Following the same manner,
4 ^ 2 = 4 ^ 2 + 4 = 16 + 4 = 20
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