Question 32

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

The logic here is

$$4^2 = 16$$ $$\longrightarrow\ $$ 1 + 6 = 7

$$5^2 = 25$$ $$\longrightarrow\ $$ 2 + 5 = 7

$$6^2 = 36$$ $$\longrightarrow\ $$ 3 + 6 = 9

Similarly,

$$7^2 = 49$$ $$\longrightarrow\ $$ 4 + 9 = 13

$$\therefore\ $$The value of $$7^2$$ in the given system = 13

Hence, the correct answer is Option B

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