## MYP Mathematics, Prime numbers

number, algebra, geometry and trigonometry, statistics and probability, discrete mathematics.

### MYP Mathematics, Prime numbers

MYP Maths, Prime and composite numbers

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

Thanks
Lucas

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

### Re: MYP Mathematics, Prime numbers

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.
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

### Re: MYP Mathematics, Prime numbers

Thank you miranda!!
Lucas

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