402. It is the first number after 400 for which the digital root (the sum of its digits) is divisible by 3.
The digital root being divisible by 3 is a test for divisibility by 3.
1, 2, and 53, have their first common multiple of 106.
400 is one such multiple.
Here are three: 1100 330 660
Find either the least common multiple, or any common multiple, of those three numbers. One way to get a common multiple is to simply multiply the numbers together. Then try multiplying that multiple by different integers, until you find one that is greater than 200.
42
5x7=35
If the number is a multiple of 8 or greater than 8. or divide by two, three times
30,60,90
84, 168, 252
36, 72, 108
They are: 20, 40 and 60
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.