100, 200, 300, 400, 500, 600, 700, 800, 900
33
44 and 88 are the only common multiples of 4 and 11 that are less than 100
44 and 88
Just 49
70 and 75
Smallest multiple of 7 greater than 100 is 15 Largest multiple of 7 less than 1000 is 142 So number of multiples of 7 = 142 - 15 + 1 = 128
99
There are fourteen multiples of seven that are under 100.
4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96
21,42,63,84
You subtract, 1000 - 100.
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