Since the lowest common multiple of 3 and 5 is 15, the common multiples of 3 and 5 are the multiples of 15: 30, 45, 60, 75, 90, etc...
The common multiples of 3 and 15 from 1 to 100 are 15, 30, 45, 60, 75, 90
lcm(2, 3, 5) = 30 → 2 digit common multiples are 30, 60, 90.
The multiples of five between sixty and ninety (inclusive) are 60, 65, 70, 75, 80, 85 and 90.
Multiples of 9 up to 100 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99. Multiples of 10 up to 100 are 10, 20, 30, 40, 50, 60, 70, 80. 90, 100. The only common multiple up to 100 of 9 and 10 is 90.
30, 60 and 90
They are any multiples of 30
30, 60 and 90
They are: 30, 60 and 90
30, 60, and 90
They are: 30, 60 and 90
The multiples of 20 are 20, 40, 60, 80, 100, 120... The multiples of 30 are 30, 60, 90, 120, 150... The multiples of 15 are 15, 30, 45, 60, 75, 90, 105, 120, 135... The common multiples of 20, 30, and 15 are 60, 120, 180, 240...
20, 40, 60 and so on. 30, 60, 90 and so on. Common multiples include 60, 120, 180 and so on.
30, 60, 90
30 60 and 90
30 60 90
30, 60, 90