6 and 12 are multiples of 2 & 3
Two and three are relatively prime, or coprime. That means that they have no smaller number, or factor, in common. So, the multiples of both numbers are the multiples of the product of the two, or the multiples of six.
52 and 54 are multiples of 2.
All of the odd numbers between 11 and 99 inclusive are two digit numbers that are not multiples of 2. There are 45 of them.
Oh, what a happy little question! When we talk about multiples, we're looking at numbers that both 2 and 9 can be divided into evenly. The common multiples of 2 and 9 are numbers like 18, 36, 54, and so on - just like little friends skipping along together in the meadow.
60 numbers
Ten multiples of two : 2,4,6,8,10,12,14,16,18,and20.
45 multiples of 2 plus 30 multiples of 3 minus 15 multiples of 6 equals 60 numbers
Multiples of 6.
2 and 14
All even numbers are multiples of two
All the multiples of 4 are also multiples of 2.
Multiple of both 2 and 3 <=> multiple of 6 So require 2 digit multiples of 6. 2*6 = 12 and 16*6=96 So the answer is 16-2+1 = 15