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Try dividing by some numbers. The larger the number, the more numbers you have to divide by. It is enough to test division by 2, and all the odd numbers up to the square root of the number.
For very large numbers, this is not efficient. There are more efficient methods, but they are also more difficult to understand.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoYou can tell it's a composite number if it can only be multiplied by 1 and itself.
zaire harrell
Wiki User
∙ 7y agoFactor it. Prime numbers have two factors, composite numbers have more than two.
Wiki User
∙ 7y agoIf a number has more than two factors, it's composite.
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Can you tell a prime or composite number by seeing if its odd or even?
You cannot. If a number is even - other than 2 - then it is a composite number. However, if it is odd, it is not easily possible to tell whether it is prime or composite.
Is 308 a prime or composite number?
it is a composite number because you can tell from the 8 that it is an even number, and even numbers can always be divided.
Is 743235 prime or composite?
A good way to instantly tell if a number is prime or composite is to learn some tricks to tell if a number divides by certain numbers. For instance, if a number is even, we know it is composite as it must be divisible by 2. If a number ends in 0 or 5, then it also cannot be prime as it would be divisible by 5. In this case, the number ends in 5, so we can tell it must be composite and cannot be prime.
How can you use a models to tell if a number is prime or composite?
you cant
How can you tell the difference between a prime number and a composite number?
Prime numbers have two factors. Composite numbers have more than two.
How can you tell 3458 is prime or composite number?
It is even and therefore composite.
Can you tell a prime or composite number by seeing if its odd or even?
You cannot. If a number is even - other than 2 - then it is a composite number. However, if it is odd, it is not easily possible to tell whether it is prime or composite.
How can you tell that 40 is a prime or composite number?
It is a composite number because it's an even number and it has more than two factors
Is 308 a prime or composite number?
it is a composite number because you can tell from the 8 that it is an even number, and even numbers can always be divided.
How do you tell if a number is composite?
A number is composite if it has more than two factors. Once you find a third, you're done.
Is 743235 prime or composite?
A good way to instantly tell if a number is prime or composite is to learn some tricks to tell if a number divides by certain numbers. For instance, if a number is even, we know it is composite as it must be divisible by 2. If a number ends in 0 or 5, then it also cannot be prime as it would be divisible by 5. In this case, the number ends in 5, so we can tell it must be composite and cannot be prime.
How can you tell what a composite number is?
It has more than two factors.
How can you use a models to tell if a number is prime or composite?
you cant
How can you tell the difference between a prime number and a composite number?
Prime numbers have two factors. Composite numbers have more than two.
What are three examples of composite numbers and tell why they are composite?
30 50 70 because they both end in 0 and 10 is a composite number
How do you check if a number is prime or a composite number?
A number is prime when it only has one and itself as factors is prime. Therefore, to tell if a number is prime or composite simply find it's factors. If it has more than two factors than it is not a prime number, it is composite.
Do you need to list every factor of a number to tell if it is prime or composite?
No. As soon as you have more than two, it's composite.
