Instructions

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

Question 134

17, 18, 26, 53, 117, ?, 458

Solution

Cubes of natural numbers are added in the series

17 + $$1^3$$ = 18

18 + $$2^3$$ = 26

26 + $$3^3$$ = 53

53 + $$4^3$$ = 117

117 + $$5^3$$ = 242

242 + $$6^3$$ = 458

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