Find the sum of all even integers between 101 and 999.

Explanation

We know that all even integers will have a common difference of `2.`


So, AP is `102, 104, 106, …, 998`


We know,` a = 102, d = 104 – 102 = 2, a_n = 998`


By using the formula, `a_n = a + (n - 1)d`


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