Composite Numbers

yes
Any even number (except 2) is a composite number. You can identify an even number by the last digit. If the last digit is even (0, 2, 4, 6, or 8), the entire number is even.

Yes, 30 is a composite number: its factors are 1, 2, 3, 5, 6, 10, 15 and 30.

18 is a composite number because a prime number can only be multiplied by 1 and itself. 18 can be multiplied by 9 and 2 also.

It's an even number so 2 must be a factor so it is composite.

A number by which another is exactly divisible.

The only composite factor of 33 is 33.

The two prime numbers 13*19=247

132 is a composite number but 5 is not one of its factors

composite numbers are those that have more than 2 factors. all even numbers other than 2 are composite numbers and some odd numbers are composite numbers. numbers that are prime are the numbers that are not composite numbers

i hope this answers your question :)

533 is composite. 533 = 13 * 41

15

Prime numbers have only 2 factors which are themselves and one whereas composite numbers have more than 2 factors

111 is composite.

If the sum of the digits in the number is divisible by 3, then the number itself is.

1+1+1 = 3, therefore 111 is divisible by 3.

111/3=37

37 is prime, so the prime factorisation of 111 is 3x37.

It is 15

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25

1 is evenly divisible only by 1 and itself (also 1). In that respect it is like a prime. However, if 1 were a prime then the Fundamental Theorem of Arithmetic - the Unique Prime Factorisation Theorem would fail - and with it much of arithmetic would become invalid.

31 is, 87 isn't.

Yes.

1 + 2 + 9 = 12 12 is divisible by 3. If the sum of the digits of a number are divisible by 3, then the whole number is divisible by 3. 129 is a composite number because it divisible by a factor other than 1 and itself.

There are none because 89 is a prime number

Because it has factors other than 1 and itself. They are 5 and 17.

31 and 37 are the only prime numbers between 30 and 40.

There are an infinite number of square numbers and prime numbers whose sums are a prime number. Examples are 202 + 103 = 503, 22 + 13 = 17, 102 + 601 = 701, 22 + 163 = 167, 42 + 141 = 157, etc.

They are: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60

231 is a composite number. This is because composite numbers are any number that has more than two factors(one and itself). Therefore, since 3, 7, and 11 to name a few are factors of 231 that makes it a composite number.

219 is a composite number. This is because composite numbers are any number that has more than two factors(one and itself). Therefore, since 3 and 73 are factors of 219 that makes it a composite number.