how many positive integers not exceeding 2001 are multiples of 3 or 4 but not 5

Answer 1

I do not know ?
It looks like a pretty hard...... Question

Answer 2

the numbers divisible by 3 = 667
by 4 = 500
by 4 = 500

Answer 3

if you draw your Venn Diagram you will find
the numbers divisible by 3 = 667
by 4 = 500
by 5 = 400
by 12 = 166
by 60 = 33 that means
by 15 = 133
by 20= 100
so the required answer will be 401+133+267=801