Three of them.
4 numbers less than 70 that are multiples of 3 and 5
As numbers get larger, it is more likely that they will be multiples of something.
There are 3 such numbers: 30, 60, 90.
When one of the numbers is positive and the other is negative.
-- both are positive numbers -- both are greater than 15 -- both are less than 1 googol -- both are even numbers -- both are written with one odd digit and one even digit -- both are powers of 2 -- both have the factors (are multiples of) 1, 2, 4, 8, and 16
All nonzero numbers have an infinite amount of multiples.
4 numbers less than 70 that are multiples of 3 and 5
Squares numbers are positive numbers. So that the square numbers less than 100 are 1, 4, 9, 16, 25, 36, 49, 64, and 81, and only 16 and 64 are multiples of 8. Thus, Greta picked 16, and 64.
There are eleven such numbers.Get the common multiple of those numbers. All other common multiples will be multiples of this common multiple; that is, you can multiply the common multiple by 1, by 2, by 3, etc. to get additional numbers that are multiples of both numbers.
15, 30, 45, 60
109 whole numbers greater than 9 and less than 999 are multiples of 9
As numbers get larger, it is more likely that they will be multiples of something.
3. All other multiples of 3 are not prime.
There are 3 such numbers: 30, 60, 90.
When one of the numbers is positive and the other is negative.
-- both are positive numbers -- both are greater than 15 -- both are less than 1 googol -- both are even numbers -- both are written with one odd digit and one even digit -- both are powers of 2 -- both have the factors (are multiples of) 1, 2, 4, 8, and 16
Prime and odd numbers