# Arithmetic Progressions

#### Answer:

(i) In this problem, we need to find the sum of all odd numbers lying between 0 and 50.

So, we know that the first odd number after 0 is 1 and the last odd number before 50 is 49.

Also, all these terms will form an A.P. with the common difference of 2.

So here,

First term (*a*) = 1

Last term (*l*) = 49

Common difference (*d*) = 2

So, here the first step is to find the total number of terms. Let us ...

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