Multiples
Write the first 3 multiples of 10
10, 20, 30
What is one factor pair of 8?
1 x 8
or
2 x 4
Is 20 a prime or composite number?
Composite
Even numbers are always composite because 2 is a factor!
1 x 20 = 20
2 x 10 = 20
4 x 5 = 20
How do you find the area of a shape?
a. Length x Width
b. Length + Width
c. 2 + Length x 2 + width
a. Length x Width
Write the first 6 multiples of 7
7, 14, 21, 28, 35, 42
What is a factor pair of 24 that does not include 1?
2 x 12 or 3 x 8 or 4 x 6
Is 39 a prime or composite number?
Composite
1 x 39 = 39 and
3 x 13 = 39
If a rectangular garden has a length of 4 feet and a width of 5 feet, what is its area?
4ft x 5ft = 20 ft2
Which one is not a multiple of 3:
a. 3
b. 15
c. 23
d. 30
c. 23
List all of the factors of 40.
1, 2, 4, 5, 8, 10, 20, 40 (there are 8 total factors)
What is a prime number? Give me a definition and an example.
A prime number is a number whose only factors are 1 and itself.
Some examples include: 2, 3, 5, 7, 11, 13, 17, 19, 23...
Find the area of a rectangle with a length of 10 inches, a width of 30 inches, and a depth of 2 inches.
10 x 30 = 300 in2
Which is a multiple of both 2 and 5?
a. 7
b. 10
c. 25
d. 32
b. 10
What is one factor of both 16 and 28 (besides 1)?
2 or 4
Is 1 a prime number? Why or why not?
1 is not a prime number because 1 is a factor of every number!
A square bedroom has a length of 12 feet. How many square feet of carpet should I buy if I want to cover the entire floor in carpet?
12 feet x 12 feet = 144 ft2
Choose the set that contains multiples of 6:
a. 6, 12, 16, 26, 30
b. 24, 8, 60, 106, 6
c. 6, 12, 3, 2, 1
d. 30, 42, 18, 66, 12
d. 30, 42, 18, 66, 12
What is one factor of 55 and 121?
11
Is 213 prime or composite?
Composite!
3 x 71 = 213
and
1 x 213 = 213
My bedroom has an area of 35 square feet. My sister's bedroom is 8 feet long and 4 feet wide. What is the difference in area of the two rooms?
35 ft2 - (8ft x 4ft)
35ft2 - 32ft2 = 3ft2