Question

how many natural numbers
under 1000 are divisible by 5 or 7 not by 35

Answer 1

Answer:

there is no any such kind of no.

if it is divisible by both 5 and 7 it must be divisible by 35

Answer 2

Answer:

999/3=333 are divisible by 3

1000/5=200 are divisible by 5

990/15=66 are divisible by 3and5

So, 333+200-66=467 are divisible by 3 and 5