Question

Given any random, 3-digit number, what is the probability that a number will be:
a) a multiple of 5
b) a multiple of 2
c) a square number
How?

Answer 1

Can the numbers include 0?

Every fifth number will be a multiple of 5 (005, 010... 105, 110...), and every other number will be a multiple of 2.

I don't know about the squares.