Question

The average of squares of consecutive odd numbers from 1 to 13 is
1. 45
2. 65
3. 42
4. 52

Answer 1

Correct Answer - Option 2 : 65

Formula used:

Average of n numbers = Sum of all numbers/n

Calculation:

Odd numbers from 1 to 13 are 1, 3, 5, 7, 9, 11, 13

Sum of squares of 1, 3, 5, 7, 9, 11, 13 is 1 + 9 + 25 + 49 + 81 + 121 + 169 = 455

∴ Average of these numbers = 455/7 = 65