Instructions
What will come in place of the question mark (?) in the given number series?
Solution
Squares of natural numbers are added.
10 $$+ 1^2$$ = 11
11 $$+ 2^2$$ = 15
15 $$+ 3^2$$ = 24
24 $$+ 4^2$$ = 40
40 $$+ 5^2$$ = 65
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