Question

find the sum of all natural number between 602 and 902 which are not divisible by 4​

Answer 1

Step-by-step explanation:

First we find sum of all natural numbers which are divisible by 4

604, 608,............900

This is an A.P with a=604 and d=4

Number of terms,

Sum of natural numbers between 602 and 902 which are divisible by 4 is

Now we find sum of all natural numbers from 603 to 901

The required sum

=(sum of all natural numbers from 603 to 901)-(sum of all natural numbers between 602 and 902 which are divisible by 4)

=224848-56400

=168448

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