Question

Find the pattern to find the sum of odd numbers. [2 MARKS]

Answer 1

Concept : 1 Mark
Calculation : 1 Mark

$1=1=1^2$ = sum of 1 odd number

$1+3=4=2^2$ = sum of 2 odd numbers

$1+3+5=9=3^2$ = sum of 3 odd numbers

So on.......

$1+3+\mathrm{5.......}+n=n^2$ = sum of n odd numbers

The sum of n number of odd numbers is equal to $n^2$.