Question 1096567: 2.the sum of integers from 1 to 100 wich are not divisible by 3 or 5 is
A.2489
B.4735
C.2317
D.2632
Answer by greenestamps(13200)   (Show Source):
You can put this solution on YOUR website!
(1) Find the sum A of all the integers from 1 to 100.
(2) Find the sum B of all the integers from 1 to 100 that are divisible by 3.
(3) Find the sum C of all the integers from 1 to 100 that are divisible by 5.
(4) Subtract B and C from A.
At this point, the numbers that are divisible by 15 have been subtracted twice, so we need to add them back in.
(5) Find the sum D of all the integers from 1 to 100 that are divisible by 15.
The number of integers from 1 to 100 not divisible by either 3 or 5 is
A - (B+C) + D.
I will let you do the calculations.... You should come up with answer choice D, 2632.
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