Factors
What is a factor?
Numbers that make up a target number with multiplication. Or Factors are the breaking down of a number into it's smallest pieces.
What is a multiple?
A number generated by multiplying to other numbers together.
What is the lowest common multiple between 5 and 10?
10
1, 2, 3, 5, 7 are examples of what?
Prime Numbers
Numbers 1 through 9 are called what?
digits
What is the largest common factor between 10 and 20?
10
How can you use a hundred's chart to help with multiples?
Skip counting and patterning on the page.
What is the lowest common multiple among 2, 3 and 4?
12
4,6,8,10 are examples of what
Composite numbers
Name two ways of organizing factors.
Factor trees, factor rainbows, factor lists
What is the largest common factor between 24 and 36?
12
Give three numbers that 42 is a multiple of.
1,2,3,6,7,14,21,42
If Mary started saving 3 loonies every day and Macy started saving 5 loonies every day. How many days would it take Mary to reach a common multiple of Macy's savings.
5 days
What two operations are needed when working with factors and multiples?
How many common factors are there between 12 and 15?
2 = 1 and 3
Give the lowest common multiple of 8 and 6.
24
How do you know that not all odd numbers are prime numbers?
Depends on the wording of the answer. Ms. Ayles has to hear it to see if it works.
There are 3 numbers between 80 and 100 that are prime numbers. What are they?
83,89,97
What other Math units that we have covered are factors and multiples related to?
Area and perimeter, patterns
Find the error in this factor list:
2, 3, 4, 6, 9, 12, 18, 36
The 1 is missing.
Ms. Ayles wants to save $100 for a new set of head phones. She decides she will put away 10 a week. Mr. Armstrong tells her she is silly and that she should put away 2 dollars a day. Which method would allow her to save the fastest.
2 dollars a day
Other than 2, how do you know that all even numbers are composite?
This is because all even numbers can be divided in half, therefor they can't be prime.
How many prime numbers make up the factors of 18?
3 - 1,2,3
24,36,48,99,101 which number does not fit in this list and why?
101 because it is a prime number