117 is a composite. I know because suming the digits is 9. A number is a multiple of 117 if it's a multiple of 9 and 13 at the same time
If a number is divisible by 3 or more numbers than that number is composite, if not than it is prime.
If a number is divisible by anything other than itself and 1, it's composite.
It is a prime.
Knowing the divisibility rules will help you by being able to recognize if a number has factors (other than one and itself) which are covered by the rules. This will save actually having to start doing divisions.
Yes you canYes. If a number is divisible by anything other than one or itself, it's composite.
If a number is divisible by 3 or more numbers than that number is composite, if not than it is prime.
If a number is divisible by anything other than itself and 1, it's composite.
I can check them for divisibility by prime numbers.
It is a prime.
Knowing the divisibility rules will help you by being able to recognize if a number has factors (other than one and itself) which are covered by the rules. This will save actually having to start doing divisions.
It's composite
350 is a composite number. it can be divisible by 10, 35, 5, 2 etc. You will find it easier to tell between prime and composite if you know the divisibility rules. one simple one is that if a number ends with zero it is divisible by 10...there are a lot of other divisibility rules.
Yes you canYes. If a number is divisible by anything other than one or itself, it's composite.
10, 25, 50 are the composite factors of the composite number 50. 2 and 5 are prime.
I suggest you try dividing it by different numbers, and see whether it is divisible. If you find a divisor, then it is composite. Otherwise it is a prime. For numbers up to 120, it is sufficient to test divisibility by 2, 3, 5, and 7.
400 is a composite number because it is divisible by more than two numbers. Because it ends in a 0, the divisibility rules indicate it is divisible by 2, 5, and 10. (It is also divisible by other numbers.) It is not a prime number because a prime number has exactly two factors, 1 and itself.
Prime numbers have two factors, composite numbers have more than two.