Question

what is the sum of 100 odd natural number

Answer 1

Sn = [n(a + an) / 2]
Where a = first odd number = 1
an = last odd number = 199
Sn = sum of all
n = = Numbers = 100
Sn = [100 (1 + 199)] / 2
Sn = 50 x 200
Sn = 10000

Answer 2

Answer:

Therefore, 10000 is the sum of first 100 odd numbers.