They are: 21, 42, 63 and 84
99
There are fourteen multiples of seven that are under 100.
21,42,63,84
There are ten different integral multiples of 10 that are equal or less than 100.
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
33
9,18,27,36,45,54,63,72,81,90,99
21,42,63,84
12,24,36,48,60,72,84,96
44 and 88 are the only common multiples of 4 and 11 that are less than 100
Multiples of 50 that are less than 200 are 100 and 150.
14 of them.