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?
Honey at 5 cups of food. Millie ate twice as much as Honey. 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?
A. 8
B. 3
C. 12
D. 40
A and D
What are two common multiples of 3 and 6?
ANSWERS WILL VARY
A number whose only factors are one and itself.
What is a prime number?
Hunter has 4 apples. He has 4 times as many as his brother. How many apples does his brother have?
4/4 = 1
His 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?
Bianca shoots an arrow 24 yards. The arrow went twice as far as Brent's shot. How many yards did Brent shoot his arrow?
24/2 = 12 OR n x 2 = 24 n=12
Brent shoots his arrow 12 yards.
Nat says that 2 is a composite number. Her reasoning is "because all the multiples of 2 are even 2 must be a composite number."
Do you agree or disagree with Nat?
Explain your thinking.
I disagree with Nat 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. O'Hern'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