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?
Honey ate 5 cups of food. Smidge ate twice as much as Honey. How much food did Smidge eat?
5x2 = 10
Smidge 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?
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
Justin has 4 apples. He has 4 times as many as his brother, Mason. How many apples does Mason have?
4/4 = 1
Mason 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
Ava shoots an arrow 24 yards. The arrow went twice as far as Scarlett's shot. How many yards did Scarlett shoot her arrow?
24/2 = 12 OR n x 2 = 24 n=12
Scar shoots her arrow 12 yards.
T$ says that 2 is a composite number. His reasoning is "because all the multiples of 2 are even so 2 must be a composite number."
Do you agree or disagree with T$?
Explain your thinking.
I disagree with T$ 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
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