To find a composite number, think of two numbers that can be multiplied to equal that number. For example, 15 is a composite number because its factors are 1, 3, 5 and 15. For a number to be composite, it should have more than two factors.To know 15 is a composite number, know:1 x 15=153 x 5 =15All composite numbers have more than two factors whereas prime numbers have only two factors.
15 is a composite number. 11 is a prime number.
15 is composite.
15 is the only composite factor of 15.
2 is a prime number and 15 is a composite number.
15 is a composite. Its factors are 1, 3, 5, and 15.
composite because 3 and 5 will go into it
No, 13 is a prime number and 15 is a composite number. A composite number is a positive integer that has more than two positive divisors.
15 is a composite number
15 is a composite number - it is the product of 3 and 5. (3*5=15)
15 is composite.
The first 12 composite numbers are.... 4,6,8,9,10,12,14,15,16,18,20,21,A composite number is basically any number that can go into that number, so like 15 is a composite number because 15x1=15,and then 5x3=15. That's two or more pair of numbers.