2100, 4200, 6300, 8400
12, 24, 36 and 48
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.
6, 12, 18, 24
4, 8, 12, 16
The first 2 common multiples of 4 and 12 are 12 and 24.
ANSWER: 12
First four common multiples of 2 and 3 is the same as the first four multiples of 6. 6, 12, 18, 24
12, 24, 36, and the fourth one is 48
The first three common multiples of 8 and 12 are 24, 48, and 72.
The first 3 common multiples of 4 and 12 are: 12, 24, 36
What are the first three common multiples of four and five
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.