It is infinity, but I think you mean factor, which would be 4. But for this question, it is infinity.
No, 130 is not a multiple of 4 and 4 is not a multiple of 130.
No. 426 is not a multiple of 4
No - but 4 IS a multiple of 8 !
No, 51 is not a multiple of 4.
No, but vice versa holds true. Case and point: 6 is a multiple of 2, but not a multiple of 4. 8 is a multiple of 4, and is a multiple of 2. Because a factor of 4 is 2, every multiple of 4 is also a multiple of 2. But since 4 is not a factor of 2, rather, only half of it, only half of the multiples of 2 will be multiples of 4.
As 100 = 4 x 25 the biggest multiple of 4 less than 100 is 4 x (25 -1) = 96
Infinate
There is no multiple of 63 so large that one can't add another 63 to it. There is no biggest common multiple; it's infinite.
The biggest multiple of any number is infinity. As long as you keep multiplying a number by a larger integer, the result will continue to increase without a maximum limit.
No, 130 is not a multiple of 4 and 4 is not a multiple of 130.
The largest common multiple of 6 and 9 is an infinite amount.
Any multiple of 4 is also a multiple of 2.
Any multiple of 20 is also a multiple of 4.
No. 426 is not a multiple of 4
No - but 4 IS a multiple of 8 !
No, 51 is not a multiple of 4.
4 and any multiple of 4