1.

The sum of the integers from 1 to 100 that are divisible by 2 or 5 is :

Answer»

3000
3050
3600
None of these

SOLUTION :Sum of integers DIVISIBLE by `2 = 50/2[2+100] = 2550`
Sum of integers divisible by `5 = 20/2 [5+100] = 1050`
Sum of integers divisible by `10 = 10/2[10+100] =550`
`rArr` Sum of integers divisible by 2,5 is = (2550 + 1050) -550 = 3050


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