Question

Is the sum of the first five odd numbers, an odd number $?$

Answer 1

Step $1:$ First five odd numbers are $1,3,5,7,9$

Step $2:$Add these numbers

Sum of first $n$odd natural number is $n^2$.

$1+3+5+7+9=5^2=25$

Hence, the sum of the first five odd numbers is an odd number i.e. $25$.