Instructions

What will come in place of the question mark (?) in the following number series ?

Question 121

9, 31, 73, 141, (?)

Solution

The pattern followed is :

$$2^3 + 1^2$$ = 9

$$3^3 + 2^2$$ = 31

$$4^3 + 3^2$$ = 73

$$5^3 + 4^2$$ = 141

$$6^3 + 5^2$$ = 241

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