Question

How many integers
between 1 - 1000 are
divisible by
2,3,5 or 7?
​

Answer 1

Answer: This gives 224+2+2=228 numbers relatively prime to 210, so 1000−228=772 numbers are divisible by 2, 3, 5, or 7.

Answer 2

Answer:

This gives 224+2+2=228 numbers relatively prime to 210, so 1000−228=772 numbers are divisible by 2, 3, 5, or 7.