Question

The sum of first 40 numbers (1 to 40) is = ?​

Answer 1

Answer:

1030

Step-by-step explanation:

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15etc gives u 1030

Answer 2

Answer: The Sum of first forty natural numbers equals to 820.

Step-by-step explanation:

We have to the sum of first 40 numbers

Sum of n natural numbers = sn

Sn = [ n ( n + 1 )/ 2 ]

Sum of 'n' natural numbers = (n(n+1))/2

Here n=40

Therefore, sum of 40 natural numbers = (40(40+1))/2

​=20 x 41

=820

Hence, we get that the Sum of first forty natural numbers equals to 820.