Not all (5 is prime) but every multiple of 5 greater than 5 is composite because they have more than two factors. Every multiple of any integer greater than one is composite.
Yes.
Yes because the five has gas
is every multiple of five a composite number true or false
Every multiple of any number (except 0 or 1) is composite.
Yes.
No. 7, itself, is a multiple of 7 [7 * 1 = 7] and it is not a composite.
Yes.
Composite. This can be most easily seen by the fact that it ends in a 5, thus it is a multiple of 5, and since it is not itself 5, it is composite.
1155 is obviously a multiple of 5 and a multiple of 11, so it is a composite number.
45 is a composite since it factors are 5 and 9.
GCF of a prime number and a composite number is 1 if the composite number is not a multiple of the prime number. Here, 5 is a prime number and 108 is a composite number(not the multiple of 5). Therefore GCF of 108 and 5 is 1.