SSC JE Mechanical Engineering 2013 Paper

Question : 32 of 200

Marks: +1, -0

Some equations are solved on the basis of a certain system. On the same basis, find out the correct answer for the unsolved equation.
If

4^2 = 7, 5^2 = 7, 6^2 = 9, \then 7^2 = ?

Solution:

4^2 = 16 ⇒ 1 + 6 = 7,

5^2 = 25 ⇒ 2 + 7 = 7

6^2 = 36 ⇒ 3 + 6 = 9,

7^2 = 49 ⇒ 4 + 9 = 13

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