Question

The sum of first 16 odd numbers is ___.

• A. 286
• B. 296
• C. 246
• D. 256

Answer 1

The correct option is D

256

The sum of first $n$ odd numbers $=n^2$

Eg: $1+3+5=3^2=9$

$1+3+5+7=4^2=16$

Similarly,

$1+3+5+7+...+{16}^{th}\text{odd number}$
$={16}^2=256$