0
None of those numbers are composite because:
in math there are composite and prime numbers.
prime numbers can't be factored (have two numbers that multiply to get that number).
prime numbers can only be "made" by multiplying themselves by 1.
exp. only 1 x 11 gives you 11.
composite numbers have factors other than themselves and 1.
exp. you can get 24 by multiplying 12 x2, 8x3, 4x6, 24x1.
3, 5, 7, and 11 are prime numbers.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
A number between 11 and 20 that is both composite and odd?
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.
Is 225 composite?
Yes. A composite number is a number that is not prime. In the case of 225, it can be broken down to 5 * 5 * 3 * 3, and is thus composite.
Is the number 55 composite?
No, the number 55 is composite because it has factors other than 1 and itself. Its factors are 1, 5, 11, and 55.
Is 15 prime or composite and why?
15 is a composite number - it is the product of 3 and 5. (3*5=15)
What is the smallest composite number that is divisible by none of the primes 2 3 5 and 7?
It is 11*13 = 143
Is the number 5445 prime or composite?
5445 is composite.Any number that ends in 5 is divisible by 5, so it must be composite (unless, of course, it is the number 5).5445 factorises to 3 x 3 x 5 x 11 x 11.
What is a composite factor of 2 3 5 11?
The composite number 330 has those prime factors.
A number between 11 and 20 that is both composite and odd?
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.
What composite number contains the factors 2 2 3 3 5 11?
1980
What is the smallest odd number and composite number?
The smallest number that is both odd and composite is 9, which is divisible by 3. The odd numbers are 1, 3, 5, 7, 9, 11, ..., and 1, 3, 5, and 7 are all prime. It is 9 that is the smallest odd composite number.
Is 225 composite?
Yes. A composite number is a number that is not prime. In the case of 225, it can be broken down to 5 * 5 * 3 * 3, and is thus composite.
Is 1155 a prime number or a composite number?
1155 is a composite number because it ends with 5. All numbers that end with 5 except 5 itself are composite numbers because they are divisible by 5, which means there are at least three factors, 1, 5, and the number itself.
Is the number 55 composite?
No, the number 55 is composite because it has factors other than 1 and itself. Its factors are 1, 5, 11, and 55.
Is 65 a prime or composite number?
compositeSixty-five is a composite number because it is divisible by five. If a number can be divide by another one, then that number is composite. Numbers like 3, 5, 7, and 11 are all prime numbers because they cannot be divided by any other number.65 is composite, as is any number of 2 or more digits ending in 5.
Is 15 prime or composite and why?
15 is a composite number - it is the product of 3 and 5. (3*5=15)
Is 15 a prime or composite number?
composite because 3 and 5 will go into it
What is the smallest composite number that is divisible by none of the primes 2 3 5 and 7?
It is 11*13 = 143
