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Because 1, 3, 5 and 15 are the only positive whole numbers that will divide evenly into 15 with no remainder.
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What are the common factors of 11 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.
What are the common factors of 5 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.
What are the common factors of 12 and 15?
The common factors of 12 and 15 are 1 and 3.
What are the factors of 15 and 37?
The factors of 15 are 1, 3, 5, 15 The factors of 37 are 1, 37
What are the common factors of 15 and 45?
Since 15 is a factor of 45, its factors are the common factors of 15 and 45. The factors of 15 are 1, 3, 5, and 15. The factors of 45 are 1, 3, 5, 9, 15, and 45. The factors they have in common are 1, 3, 5, and 15.
Why is 1 and 5 the only factors of 15?
The factors of 15 are 1, 3, 5 and 15.
What are the common factors of 11 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.
What are the first five common factors of 15 and 25?
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
What are the common factors of 5 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.
What are the factors of 15 up to 300?
The factors of 15 only go up to 15. 1, 3, 5, 15
What are the factors of 27 and 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 .
What is the greatest common factor of 15 11?
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.
Common factors of 11 and 15?
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.
What are the common factors of 12 and 15?
The common factors of 12 and 15 are 1 and 3.
Why isn't 15 a prime number?
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.
What are the factors and prime factors of 15 and 23?
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.
Why is 19 a prime number but 15 is not a prime number?
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.
