Find the sum of all odd integers between 2 and 100 divisible by 3

Explanation

The odd integers between `2` and `100 `which are divisible by `3` are `3, 9, 15, 21, ..., 99.`

Here, `a=3` and `d=6`.

`a_n​` `=99`

`=>a+(n−1)d=99`

`=>3+(n−1)xx6=99`

`=>6(n−1)=96`

`=>n−1=16`

`=>n=17`
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