Because 1, 3, 5 and 15 are the only positive whole numbers that will divide evenly into 15 with no remainder.
The factors of 11 are 1 and 11 The factors of 15 are 1,3,5, and 15. 1 is the only common factor of 11 and 15.
The factors of 15 are 1,3,5, and 15The factors of 5 are 1 and 5.there are only two common factors of 5 and 15 and they are 1 and 5.
The common factors of 12 and 15 are 1 and 3.
Oh, dude, a composite number is basically a number that has more factors than just 1 and itself. So, for 15, you've got 1, 3, 5, and 15 as factors, making it a composite number. It's like the popular kid at the math party with all those factors hanging out with it.
The factors of 15 are 1, 3, 5, 15 The factors of 37 are 1, 37
The factors of 15 are 1, 3, 5 and 15.
The factors of 11 are 1 and 11 The factors of 15 are 1,3,5, and 15. 1 is the only common factor of 11 and 15.
The factors of 15 are 1, 3, 5, 15. The factors of 25 are 1, 5, 25. The only common factors are 1 and 5. In case you mean common multiples, those are 75, 150, 225, 300, 375
The factors of 15 only go up to 15. 1, 3, 5, 15
The factors of 15 are 1, 3, 5, and 15 .The factors of 27 are 1, 3, 9, and 27 .The only common factors (factors of both 15 and27) are 1 and 3 .
The factors of 15 are 1,3,5, and 15The factors of 5 are 1 and 5.there are only two common factors of 5 and 15 and they are 1 and 5.
1 The factors of 15 are 1, 3, 5, and 15. 11 is a prime number with only the factors 1 and 11 The only factor they share is 1.
Factors are numbers which divide another number exactly. The factors of 11 are 1 and 11. The factors of 15 are 1, 3, 5 and 15. So the only common factor of 11 and 15 is 1.
The common factors of 12 and 15 are 1 and 3.
A number is prime if it has only 1 and itself as factors. For example, 7 is a prime number because it has only 1 and 7 as factors. 15 isn't a prime number because it has 1, 3, 5, and 15 as factors.
The factors of 15 are: 1, 3, 5, and 15.The prime factors of 15 are: 3 and 5.23 is a prime number. It is only evenly divisible by itself and one.
19 only has 2 factors - itself and 1. 15 has 4 factors - itself, 1, 3, and 5. Prime numbers can only have 2 factors. 19 is prime, 15 is composite.