180, 360, 540, 720, 900
180 is the first one.
-55
The first 5 common multiples are the first 5 multiples of their lowest common multiple (LCM) LCM(9, 10) = 90 → first 5 common multiples are 90, 180, 270, 360, 450.
The first 5 multiples of 36 are: 36, 72, 108, 144, and 180.
The first 5 multiples of 45 are: 45, 90, 135, 180, and 225.
60, 120, 180, 240, 300
They are: 45 90 135 180 and 225
60, 120, 180, 240, 300.
45, 90, 135, 180, 225
180, 360, 540
60, 120, 180
60, 120, 180.