Question

The sum of first 25 odd numbers is:

• A. $(25-1{)}^2$
• B. $(25+1{)}^2$
• C. ${25}^2$
• D. ${24}^2$

Answer 1

The correct option is C ${25}^2$

The sum of first $N$ odd numbers is $N^2$.
$1+3+5+7+......N\text{terms}=N^2$

So, the sum of first $25$ off numbers is ${25}^2$.