56
840
LCM(4, 5, 7) = 140
6
The numbers 5, 3, 4, and 7 do not have a common factor other than 1. Therefore, they do not go into a specific number as a group. Each of these numbers can only be divided by 1 and itself without leaving a remainder.
63
Any multiple of 140.
840
3
The numbers 5, 7, and 4 can all go into their least common multiple (LCM). The LCM of 5, 7, and 4 is 140. This means that 140 is the smallest number that is divisible by all three of them. Thus, any multiple of 140 will also be a common multiple of 5, 7, and 4.
LCM(4, 5, 7) = 140
There is no such even number.
28
both these number go into the number 112
84
It is 420
84
13,7, and 4 all go into 364.