Factors
List the factors of 14.
1, 2, 7, and 14
The multiples of 3 up to 25
What is 3, 6, 9, 12, 15, 18, 21, and 24?
Numbers that can be multiplied together to get the original number.
What are factors?
Mike at 5 cups of food. Millie ate twice as much as Mike. How much food did Millie eat?
5x2 = 10
Millie ate 10 cups of food (OH MAN...that's a lot)
Select the 2 prime numbers
A. 13
B. 84
C. 51
D. 67
A and D
How many factor pairs does 12 have?
3 factor pairs
The first 5 multiples of 5
What is 5, 10, 15, 20, and 25?
The product of a number multiplied by another number. Or the result of counting by a certain number.
What is a multiple?
Last summer I went on a camping trip. While hiking, I found a worm and a snake. I took out my measuring tape to see how long they both were. The worm was 6 inches long. The snake was 7 times longer. How long was the snake?
6x7 = 42
The snake was 42 inches long.
This number is composite.
A. 29
B. 31
C. 88
D. 2
What is C
Which two numbers are factors of 200? answers.
A. 8
B. 3
C. 12
D. 40
A and D
Give me 3 common multiples of 3 and 6?
ANSWERS WILL VARY
A number whose only factors are one and itself.
What is a prime number?
Scarlett has 4 apples. She has 4 times as many as her brother. How many apples does her brother have?
4/4 = 1
Her brother has 1 apple.
Is 91 prime or composite? Explain how you know.
91 is composite.
12x7 = 84
84 + 7 = 91
13x7 = 91
Which product has an ODD number of factors? How do you know?
A - 7
B - 16
C - 24
D - 19
B - 1, 2, 4, 8, 16 (has 5 factors)
Because it has a square array that is a 4x4.
Look at each pair of numbers. Which one shows the second number is a multiple of the first number.
A. 8,22
B. 5,92
C. 3,29
D. 6,48
D
A number who is a whole number greater than 1 with more than two factors.
What is a composite number?
Sally shoots and arrow 24 yards. The arrow went twice as far as Sal's shot. How many yards did Sal shoot his arrow?
24/2 = 12 OR n x 2 = 24 n=12
Sal shoots his arrow 12 yards.
Jason says that 2 is a composite number. His reasoning is "because all the multiples of 2 are even 2 must be a composite number."
Do you agree or disagree with Jason.
Explain your thinking.
I disagree with Jason because 2 is a prime number. 2 is a prime number because it only has 2 factors 1 and 2. Having even multiples does not determine if a number is prime or composite.
Draw all the arrays to show the factors of 48.
Then, list the factors of 48?
1, 2, 3, 4, 6, 8, 12, 16, 24, 48
What multiples are the common multiples of 5 and 15?
1, 3, 5, 15, 25, 27, 30, 32, 35, 40, 42, 45
15, 30, and 45
Two numbers that when multiplied together give a certain product.
What are factor pairs?
Ms. McCoy's class counted by 20s. How many people counted to get 300? How do you know?
15 people (explanations will vary)
1. 5x20 = 100
10x20 = 200
15x20 = 300
2. I know 2x15=30 so 20x15=300
Is 93 prime or composite? Explain how you know.
93 is composite because there are at least 3 factors, 1, 93, and 3.
OR
There are two factor pairs
1x93 and 3 x 31