Question

Find the value of
(1 + 3 + 5 + 7 + 9 + 11 + 13 + 15).

• A. 25
• B. 36
• C. 49
• D. 64

Answer 1

The correct option is D

64

$\text{We know that, sum of n consecutive}\text{odd integers starting from 1 is}\text{equal to}{n}^2.$

$\text{Here the total number of consecutive}\text{odd integers is 8.}$
$\text{Thus, n = 8 and their sum is}{8}^2=64.$