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The sum of integers from 1 to 100 which are divisible by 2 or 5 is 1 point

Answer»

The integers , which are divisible by both 2 and 5 are 10 , 20 ......... 100 .

This ALSO forms an A.P. with both the first TERM and common difference equal to 10 . This the sum of integers from 1 to 100 which are divisible by 2 or 5 , is 3050 .

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