40, 80, 120
30
Any multiple of 30.
It is: 120
The common multiples of 3,4, and 10 would be all the multiples of 60. 60, 120, 180, 240... all the way to 6000.
Common denominators. These are called "common multiples". For example, multiples of 4 are: 4,8,12,16,20,24 ... . Multiples of 6 are: 6,12,18,24,30,36 ... . The numbers on both lists are the common multiples and they include: 12,24,36, ... . Specifically, the smallest number in any such list of common multiples (12 in this example) is known as the Least (or Lowest) Common Multiple or LCM.
30, 60 and 90
There are three numbers between 10 and 50 which are divisible by both 3 and 5. All numbers that are multiples of 3 and 5 are the multiples of the lowest common multiples (lcm) of 3 and 5 which is 15. The multiples of 15 between 10 and 50 are {15, 30 and 45}, thus there are 3 numbers.
To find numbers between 55 and 101 that are multiples of 3, 10, and 15, we need to find the numbers that are common multiples of these numbers within the given range. The common multiples of 3, 10, and 15 are numbers that are divisible by the least common multiple (LCM) of these numbers, which is 30. Therefore, the numbers between 55 and 101 that are multiples of 3, 10, and 15 are 60, 90, and any other multiples of 30 within that range.
5
1 11 10
They are: 30, 60 and 90
4, 6 and 10