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Q: Is Every multiple of 5 is a composite number and why?
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Why is every multiple of 5 a composite number?

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.


Is every multiple of 5 a composite number true or false?

False. A composite number is a positive integer greater than 1 that has more than two distinct positive divisors. Every multiple of 5 is not a composite number, as 5 itself is a prime number with only two distinct positive divisors, 1 and 5.


Is every multiple of 5 a composite number?

Yes because the five has gas


Is every multiple of 5 composite?

Yes.


What is the GCF of 108 and 5?

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.


Is Every multiple of 5 is composite?

Yes.


Is 1155 prime composite or neither?

1155 is obviously a multiple of 5 and a multiple of 11, so it is a composite number.


Is 2315 a prime or composite number?

2315 is a composite number like every number greater than 5 that ends with a 5.


Is 130 a composite number?

Yes. any number ending in 5 or 0 is a multiple of 5 and any number ending in 0 is a multiple of 10. (:


Is 45 prime or composite?

45 is a composite since it factors are 5 and 9.


Is 385 a composite number?

Yes. It ends in 5 so it is a multiple of 5. 5 * 77 = 385.


Is 189 a prime or composite number?

189 is a composite. Some quick tests, which can be done in your head: Check if the number is even (2 is a factor). Ones place will have 0,2,4,6, or 8 if even. Multiple of 5 (5 is a factor): Ones digit is 0 or 5. Multiple of 3 or 9: Add up the digits in the number; if this sum is 3 or a multiple of 3, then the original number is a multiple of 3 (3 is a factor). Additionally, if this sum equals 9 or a multiple of 9, then 9 is a factor. This is the case for 189 : 1+8+9=18, which is a multiple of 9. Since we found a factor (in addition to 1 & the original number) then the number is composite and not prime.