Question

find the sum of odd numbers within 100​

Answer 1

Answer:

Here's ur answer

Step-by-step explanation:

Sum of odd consecutive integers from 1 to 100

= (Sum of all consecutive integers from 1 to 100) - (Sum of even consecutive integers from 1 to 100).

Sum of odds = (100 x 101/2) - [2 x (50 x 51/2)] = 5050 - 2550 = 2500

Hope it's helpful..

Answer 2

Answer:

2500

Step-by-step explanation:

GIVEN THAT

find the sum of odd numbers within 100

number of odd numbers within 100 = 50

the AP can be written as = 1,3,5,...99

in this AP

a = 1 ,n = 50 , l = 99

Sn = required sum

REQUIRED FORMULA

Sn = n/2(a + l)

Sn = 50/2(1+99)

Sn = 25(100)

Sn = 2500