Question

State whether true or false:

121 can be expressed as the sum of 11 odd numbers.

• A. True
• B. False

Answer 1

The correct option is A True

Sum of first $n$ consecutive odd numbers is $n^2$
Thus, we have

$1+3+5+7+9+11+13+15+17+19+21=(11{)}^2=121$ (as there are 11 odd numbers n=11)