Question

find the sum of first 5 natural numbers? ​

Answer 1

ok we know that natural no start with 1

so

1+2+3+4+5=15

so the sum of first 5 natural no is 15

Answer 2

1+2+3+4+5

=15

Also

1+2+3+..........+n=0.5n (n+1)

hope it helps