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What number between 300 and 400 exactly has 15 factors?
This number would have to be a squared number as it only has 15 factors. The number I have calculated is 324 as the square root is 18
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.
Which number has exactly 15 factors?
it is 400 the numbers that go in it are 1,2,4,5,8,10,20,40,50,80,100,200,400
What is a number between 15 and 20 that is a composite number and has exactly 5 factors?
16
Are the only factors of 125 is 1 15 and 25?
Not exactly. 1 and 25 are correct, but 15 is not a factor of 125 (125 / 15 = 8.33). If your 1 in the number 15 was meant to be a comma, then you are correct: 1,5, and 25.
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 is the highest divident of 15?
I'm not sure exactly what you're looking for. The factors of 15 are 1, 3, 5 and 15. The highest number that 15 can be divided by that will result in a whole number is 15.
What number is composite 15 17 19 0r 23?
15 has more than exactly two factors (1, 3, 5, and 15), therefore it is composite. 17, 19, and 23 each have exactly 2 factors (1 and the number itself), so they are primes.
What number has exactly 8 factors?
the number 105 does - 1, 3, 5, 7, 15, 21, 35, 105
Which number from ten to twenty has an odd number of factors?
Only perfect squares can have an odd number of factors. The answer is 16. It has five factors: 1,2,4,8,16.
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.
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.
