Find the numbers of positive integers from 1 to 1000, which are divisible by at least 2, 3, or 5.

What are the principle of inclusion & exclusion ? ex:- Find the no. of positive integers from 1 to 1000 which are divisible bY atleast 2;3 and 5 .

Find the number of all positive integers of 3 digits which are divisibleby 5.

Find the number of positive intergers up to 100 which are not divisible by any 2,3 and 5 ?

The sum of the integers from 1 to 100 which are not divisible by 3 or 5 is

Find the number of positive integers not exceeding 100 which are divisible by 2 or 3 but not by 4. (a) 40 (b) 58 (c) 42 (d) 43