Prime Numbers and Prime Factors

What we did Today:

HOMEWORK QUESTIONS ANSWERS

Notes
What are factors?: A factor is a whole number which divides evenly into a whole number leaving no remainders. A whole number is a number without decimals in it like 2.50

What are prime numbers?: A prime number is a whole number greater than 1 that has only 2 factors: 1 & itself. 1 is not a prime number. Some examples are prime factors are 2,3,5,7,11,13.

What are prime factors?: Prime factors are factors that are prime numbers. In my words, its putting a whole number into its lowest prime numbers also known as Prime Factorization. A way to use this method is to use a Factor Tree. Lets use an example like the number 12. Find factors of 12 and put it into the lowest prime numbers you get. Here is an example of a factor tree for 12.

Read more...

Prime numbers and prime facotrs.

What we have learned today:
1.) Square numbers (perfect squares) are the product of a whole number when it is multiplied to itself. Eg. 4= 2x2. Therefore 4 is a square number.

2.) Factors are whole numbers that divides evenly into a whole number, leaving no remainder.
Eg. Factors of 16:
1 2 4 8 16

3.) Prime numbers are whole numbers greater than one, that have only two factors, which is one (1) and itself.
Examples of prime numbers are 2, 3, 5, 7, 11.
PS: One (1) is NOT a prime number. Why? Because it only has one factor, which is itself.

4.) Prime factors are the least possible factors of a number; must always be a prime number. The Prime Factorization method is used to get the prime factors of a number. (factor tree)
Eg. 18
/\
9 2
/\ \
3 3 2 = Prime factors.

Read more...