30
6, 12 and 18.
424 is an even number so passes first test, but digits do not add to a multiple of 3 so it fails second. It is not a multiple of 6. 426, however, is, as is 444.
126
The Least Common Multiple (LCM) for 4 6 is 12.
The First common multiple of 6 and 7 is 42 and the next common multiple is 84.
6 and 12 are the first two
24.
30
6, 12, 18, 24, 30.
6, 12 and 18.
36
6, 12, 18, 24, 30, 36
No, 3 isn't a multiple of 6 because the first multiple of 6 is 6. 3 is a factor of 6. 6 is a multiple of 3.
168
It asks for the next multiple which is times two from that number like 6 times 2 which equals 12
the first three common multiple of 6 and 8 are : 28,48,72