2, 3 and 5 are all prime numbers. So to find the lowest common multiple, you just need to multiply them all together:
2x3x5=30
To find other multiples of 2,3 and 5, you just need to find multiples of 30. You can do this by calculating 30x2, 30x3, 30x4 and so on.
Examples of multiples of 2,3 and 5 would therefore be 30, 60, 90, 120, and 150.
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The first three common multiples of 6 and 8 are the first three multiples of the least common multiple of 6 and 8. 6 = 2 x 3 and 8 = 2 x 2 x 2. Therefore, the LCM of 6 and 8 is 2 x 2 x 2 x 3 or 24. The first three multiples of 24 are 24, 48 and 72.
The common multiples of any two or more numbers are the multiples of their lowest common multiple.lcm(3, 4, 5) = 60→ first three common multiples are:60 x 1 = 6060 x 2 = 12060 x 3 = 18060, 120, 180
12*1 + 12*2 + 12*3 = 12*(1+2+3) = 12*6 = 72
To start with the 3 common multiples of 5 they are........10,15,and 25the 3 common multiples of 3 are.........15,30,and 45hope this helped=)
What are the first three common multiples of four and five