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MYP Maths, Prime and composite numbers

How can we express 80 as the product of its prime factors.

Thanks

How can we express 80 as the product of its prime factors.

Thanks

- Lucas
**Posts:**0**Joined:**Mon Jan 28, 2013 8:05 pm

MYP Maths, Prime and composite numbers

A prime number is a natural number greater than 1 which has exactly two factors, 1 and itself.

A composite number is a natural number greater than 1 which has more than two factors.

You must know that the number 1 is neither prime nor composite.

Also the Fundamental theorem of arithmetic states that Every composite number can be written as a product of prime factors in one and only one way.

To find the prime factors of a composite number we systematically divide the number by the prime numbers which are its factors, starting with the smallest.

So for your question 80/2=40

40/2=20

20/2=10

10/2=5 which is prime

Thus the prime factorization of 80=2*2*2*2*5

A prime number is a natural number greater than 1 which has exactly two factors, 1 and itself.

A composite number is a natural number greater than 1 which has more than two factors.

You must know that the number 1 is neither prime nor composite.

Also the Fundamental theorem of arithmetic states that Every composite number can be written as a product of prime factors in one and only one way.

To find the prime factors of a composite number we systematically divide the number by the prime numbers which are its factors, starting with the smallest.

So for your question 80/2=40

40/2=20

20/2=10

10/2=5 which is prime

Thus the prime factorization of 80=2*2*2*2*5

- miranda
**Posts:**268**Joined:**Mon Jan 28, 2013 8:03 pm

Thank you miranda!!

- Lucas
**Posts:**0**Joined:**Mon Jan 28, 2013 8:05 pm

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