Question 67

Which number comes in the place of the question mark (?)
5, 25, 61, 113, ?

Solution

$$1^2 + 2^2 = 5 $$; $$3^2 + 4^2 = 25$$ ; $$5^2 +6^2 = 61$$ , $$7^2 + 8^2 = 113$$ ; $$9^2 + 10^2 = 181$$

Create a FREE account and get:

Which number comes in the place of the question mark (?)5, 25, 61, 113, ?