5 + 10+15+20=50 ans
6 8 9 2 5 7
4, 8, 12
7, 14, 21, 28, 35, 42, 49, 56
4, 8 and 12 are the first 3 common multiples of 2 and 4
lcm(2, 7) = 14 → first 3 common multiples are: 14, 28, 42; lcm(2, 8) = 8 → first 3 common multiples are: 8, 16, 24; lcm(7, 8) = 56 → first 3 common multiples are: 56, 112, 168; lcm(2, 7, 8) = 56 → first 3 common multiples are: 56, 112, 168.
The common multiples of an set of numbers are the multiples of their lowest common multiple. lcm(7, 8, 9) = 504 → the first 3 common multiples of 7, 8, 9 are 504, 1008, 1512.
168, 336, 504.
5 + 10+15+20=50 ans
the first 7 multiples of 8 are 8 16 24 32 40 48 56.
8, 16, 24
First 3 multiples of: 3: 3, 6, 9 8: 8, 16, 24 9: 9, 18, 27 72, 144, 216
1, 2, 3, 4, 5, 6, 7, 8, 9 and 10
24, 48, 72
8 and 9 are corpime, so their first common multiple is their product. The next common multiples are simply the multiples of that first multiple.The first three common multiples are therefore 72, 144 and 216.
They are the multiples of 3*8 = 24
6 8 9 2 5 7