They are both composite because they are even.
They are composite numbers because 36 can be formed by 6x6 and 72 can be formed by 6x6x2. Since prime numbers means that they are only divisible by 1 and itself, the numbers are not prime numbers. Also, any number greater than 1 is either a composite or prime number, so they are composite numbers.
29 and 31 are prime. The rest are composite.
29 is prime. 36 and 87 are composite.
62 is not a prime number. It is composite. 62=2*31
Composite
Composite
23 and 31 are prime. 36, 62 and 87 are composite.
23, 29 and 31 are prime, the rest are composite.
29 and 31 are prime. The rest are composite.
It is composite.
62 is composite.
composite
29 is prime. 36 and 87 are composite.
62 is not a prime number. It is composite. 62=2*31
Composite
Composite
Composite 2 goes into it
The factors of 62 are 1, 2, 31, and 62. Since it has more factors besides '1' and 62, it's a composite number.