Prime and Composite
What is the definition of a prime number?
A number that has only TWO factors. One and itself.
What is the formula for perimeter?
L + L + W + W
What is the formula for area?
Length x width
What are the multiples of 10?
10,20,30,40,50,60,70,80,90,100
There are 2 times as many cookies as muffins in the shop. If there are 10 muffins, how many cookies are there?
20! There are more cookies!
What is the definition of a composite number?
A composite number has at least three factors, and sometimes a lot more.
2 L + 2 W
The inside!
What are the factors of 20?
1,2,4,5,10,20
There are 3 times are many sneakers as sandals at the store. If there are 5 sandals, how many sneakers are there?
15. There are more sneakers!
Is the number 0 prime or composite?
Neither! The number zero is not prime or composite.
What is the perimeter of a rectangle with dimensions
L: 10 and W: 5
30
10 + 10 + 5 + 5 = 30
What is the area of a rectangle with 5 length and 3 width?
Does the number 10 have 5 factors?
No.
1,2,5,10
Vince has 5 cones. Luigi has 4 times as many as Vince. How many cones does Luigi have?
Luigi has 20 cones.
4 x 5 = 20
Is the number two an example of a prime or composite number?
Prime. (Only factors are 1 x 2 )
L: 20 W: 5.
50.
20 + 20 + 5 + 5= 50
What dimensions can a rectangle be with an area of 20? (think of the factors of 20)
1 X 20
2 x 10
5 x 4
True or False? The number 15 is a multiple of 5?
The multiples of 5 are: 5, 10, 15, 20...
Jordan has $80, which is 8 times as many as Ethan. How much money does Ethan have?
Ethan has 10 dollars.
8 x 10 = 80.
Is the number 35 an example of a prime or composite number?
Composite! The factors of 35 are:
1,5,7,35,
Two rectangles have an area of 20, but different perimeters. What is one way?
L: 5 W: 5
L: 7 W: 3
L: 4 W: 6
Mike's backyard has an area of 40 sq ft. If the length is 8, what is the width?
Width is 5.
8 x 5= 40
True or False? The number 15 is a factor of 5?
False!
The factors of 5 are: 1,5
Sophia has 48 stitch stickers, which is 6 times as many as Kate. How many stickers does Kate have?
Kate has 8 stitch stickers.
8 x 6 = 48.