90, 180, 270, 360, 450, 540, 630, 720, 810, 900, 990, 1080, ..
60, 72, 84.
12
90 has an infinite number of multiples.
Common multiples of 9 and 10 are all of the multiples of 90.
These are the first 90 multiples of 7:714212835424956637077849198105112119126133140147154161168175182189196203210217224231238245152159266273280287294301308315322329336343350357364371378385392399406413420427434441448455462469476483490497504511518525532539546553560567574581588595602609616623630
6+12+18+24+30=90
45, 90, 135. 6, 12, 18.
Multiples of 90.
The multiples of 12 are 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, and so on. The multiples of 15 are 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, and so on.
The first 5 multiples of 6 are: 6, 12, 18, 24, and 30.The first 5 multiples of 9 are: 9, 18, 27, 36, and 45.
Multiples of 90
First 12 multiples of 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108.