Problem.

The sum of certain consecutive odd numbers is – Find the numbers.

solution

also from equ 1

therefore

similarly

a = 27 , d = 2

l= 113

a+nd = 113

27 + 2n = 113

n = 43

this is where I am facing the problem. To satisfy the condition I should have n = 44 and not 43.

because 57 - 13 = 44. other way to find the n.

Please correct my understanding...