20 is a possibility.
The only prime factor of 4 is 2. No prime number is a multiple of 5.
Factor of 24, but not a multiple of 8
1, 2, 4
It must be 10.
1, 2, 5, 10
1 and 5
First factor 100: 100 = 2 * 2 * 5 * 5 From this, you can figure out that 100 is a multiple of 2, 5, and 4 (2*2).
A factor of 20 is a number that divides evenly into 20 without leaving a remainder. The factors of 20 are 1, 2, 4, 5, 10, and 20. Among these, the number 5 is a factor of 20 but not a multiple of 4 because it does not result from multiplying 4 by any integer.
60 and 120
There is no such number. If a multiple of 4 is a factor of 30, then 4 must also be a factor of 30, but 4 is not a factor of 30 (the factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30), thus no such number exists.
No. 5 is a factor of 20, and 20 is a multiple of 5 .
A factor (or divisor) is a number which evenly goes into the number of which it is a factor. E.g. 5, 2, 10 and 4 are factors of 20. A multiple is a number which is a whole number of times larger than the number of which it is a multiple. E.g. 4, 6, 8, 10 and so on are multiples of 2. A product is very similar to a multiple; the product of two numbers is the two multiplied together. E.g. the product of 5 and 4 is twenty, as is the product of 10 and 2.