Question

Find the sum of the first 25 odd natural numbers.​

Answer 1

Answer: 625 is the sum of the first 25 odd natural numbers.

Answer 2

The odd numbers are: 1, 3, 5, 7, 9,….49

The first term is = 1

The common difference is, d = 2

The total no.of terms is, n = 25

Sum = n/2 x (a+Tn)

=25/2 x (1+49)

=1250/2

= 625

Therefore, the sum of first 25 odd numbers is 625.

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