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If all the factors are prime numbers and they total the original number, you have found them all.
All composite numbers can be expressed as unique products of prime numbers. This is accomplished by dividing the original number and its factors by prime numbers until all the factors are prime. A factor tree can help you visualize this.
Example: 210
210 Divide by two.
105,2 Divide by three.
35,3,2 Divide by five.
7,5,3,2 Stop. All the factors are prime.
2 x 3 x 5 x 7 = 210
That's the prime factorization of 210.
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How do you know if a fraction is in its simplest form in your head?
If it has no prime factors in common. The prime factors of 16 are all twos and the prime factors of 27 are all threes. 16/27 has to be in simplest form.
Why do you need to know all of the factors to a number to know if it is a prime or composite number?
You don't.If you know just one factor, other than 1 and the number itself, you will know that the number is composite.A prime has only two factors: 1 and itself. So all the factors is no big deal.
What is all the prime factors of 76?
All the prime factors of 76 are 2 and 19.
How do you know when you have found the longest factor string for 840?
You will know because all of the numbers are prime.
What is example of prime factor?
All numbers have factors. Some factors are prime numbers. These are known as prime factors. 2 and 3 are prime factors of 6. 1 and 6 are not prime factors of 6.
How do you know when you have found the longest string of factors for a number?
When all the factors are prime.
How do you know when you have found the longest possible sting factors of a number?
All of the factors are prime.
How do you know when you've found all the factors of a number?
If you multiply all the prime factors you've found together and the result is the number, you have found all of them.
How do you know when you have found the longest factor string for a number?
All of the factors are prime.
How do you know when you finish a prime factorization?
When all of the factors are prime.
Would you rather find all the factors of a number or find all the prime factors of a number?
Once all the prime factors of a number have been found, the number of factors the number has and what they are can be found. I'd be finding the prime factors first before finding all the factors of a number, so I'd rather find all the prime factors as it means I can stop before I have to do more work in finding all the factors.
How do you know if a fraction is in its simplest form in your head?
If it has no prime factors in common. The prime factors of 16 are all twos and the prime factors of 27 are all threes. 16/27 has to be in simplest form.
Do you need to know all the factors of a number in order to determine if it is a prime or composite?
No. There are techniques to find if it is prime
How do you know you have the biggest factor string?
When all of the factors are prime. The longest factor string is the prime factorization.
Why do you need to know all of the factors to a number to know if it is a prime or composite number?
You don't.If you know just one factor, other than 1 and the number itself, you will know that the number is composite.A prime has only two factors: 1 and itself. So all the factors is no big deal.
How do you know you found all factors to a number?
How to know that you found all the factors for example my teacher taught me that when u reach a double diget number that is all the factors. ( 6x6)-~ double diget number
Do you need to know all of the factors of a number in order to determine if it is prime or composite?
No because, all you have to know is your multiplication to help you.
