48 is a common multiple
48, 96, 144 and so on.
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16, 32, 48. Since 16 is divisible by 4. Every multiple of 16 is also a multiple of 4, so I just took the first 3 multiples of 16.
The first five multiples of 4 are 4, 8, 12, 16 and 20. For them to be common, they need to be compared to another set of multiples.
4, 8, 12, 16
A common multiple of two integers 'x' and 'y', are the multiples of 'x' which are also multiples of 'y'.For your example, because 12 is itself a multiple of 4, ALL multiples of 12 are common multiples of 4 and 12.To prove my point, I will list out the multiples of both 4 and 12:multiples of 4:4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96, 100...multiples of 12:12,24,36,48,60,72,84,96...You can see here that every multiple of 12, is also a multiple of 4, thus all multiples of 12 are common multiples for 4 and 12.Also..a quick easy list:12,24,36,48,60,72,84,96and if you didn't read above, because 12 is a multiple of for, all multiples of 12 are a multiple of 4 .. simple!
Here is one example: 20, 40, 60, 80, 100, 120, 140, 160, 180.