3, 6, 9, 12, 15, 18, 21, 24, 27.
10 and 20
There are 3 such numbers: 30, 60, 90.
12, 18, 24, 30 and 36.
18, 21, 24, 27.
15, 30 & 45
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
Multiples of 6 that are less than 36 are: 6, 12, 18, 24, and 30.
10 and 20
Multiples of 3 less than 20 are {3,6,9,12,15,18}.
3,6,9,12,15,18,21,24,27
2,4,6,8,10,12,14,16,18,20,22,24,26,and 28
36 and 42
There are 3 such numbers: 30, 60, 90.
14 21 28
The multiples of 4 that are less than 30 are 4, 8, 12, 16, 20, 24, 28
The positive multiples of 6 less than 40 are 6, 12, 18, 24, 30, and 36.
The multiples of 10 that are less than 125 are 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, and 120.