6
... 7 x 30 = 210, that should give you a clue...
The multiples of 5 that are also multiples of 6 are multiples of their LCM. The LCM of 5 and 6 is 30, so the question becomes which multiples of 30 are less than 100? The solution is the numbers: 30, 60, 90
120, 150 and 180.
The multiples of 6 less than 30 are numbers that can be divided evenly by 6 and are less than 30. To find these multiples, you can start by listing the multiples of 6: 6, 12, 18, 24. Therefore, the multiples of 6 less than 30 are 6, 12, 18, and 24.
Multiples of 6 that are less than 36 are: 6, 12, 18, 24, and 30.
10 and 20
There are six: 6, 12, 18, 24, 30, 36.
There are 30 multiples of 30 that fall between 100 and 1,000.
There are 30 multiples of 30 between 100 and 999.
These: 6, 12, 18, 24, 30, 36, 42, 48.
There are 3 such numbers: 30, 60, 90.
3,6,9,12,15,18,21,24,27