-105
Combined, they would be 60, 120, 180 and so on.
120 and all the multiples of 120.
15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225 . . . ∞
15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225 . . . ∞
15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225 . . . ∞
225, 450, 675, 900, and 1125.
The LCM is 1800.
120 and all its multiples.
Common multiples include 75, 150, 225 and so on.
The GCF is 15.
120, 240, 360 and so on.
The common multiples of 15 and 25 are all multiples of their LCM, which is 75. So, the common multiples are 75, 150, 225, 300, 375, 450, 525, 600, and so on.