Prime or Composite
A prime number only has:
Two Factors, 1 and itself
25 ÷ 2
12 R1
The bakery's rectangular floor is 21 feet long by 8 feet wide. How many square feet of flooring do they need?
21 x 8 = 168 square feet of flooring
List all the factors of 4
1, 4, 2
98 x 6
588
What is a COMPOSITE number?
A composite number has:
More than two factors
85 ÷ 4
21 R1
Cookies are sold in packages of 3. The 20 students will each be given 1 cookie. How many packages of cookies are needed?
20 x 1 = 20 cookies needed
20 ÷ 3 = 6 R2
7 packages of cookies are needed so that each student gets 1 cookie
List all the factors of 9
1, 9
Composite
Factors- 1, 14, 2, 7
True or False: The number 18 is a PRIME number. List factors to prove your answer.
FALSE
Factors: 1, 18, 2, 9, 3, 6
96 ÷ 6
16
There are 24 crayons in a box. The teacher bought 6 boxes. How many crayons does he have?
24 x 6 = 144 crayons
List all the factors of 15
1, 15, 3, 5
What is the formula for AREA?
A= L x W
Prime
Factors: 1, 29
97 ÷ 7
13 R6
The restaurant ordered 25 large plates. They ordered 8 times as many small plates. How many more small plates were ordered than large plates?
Large- 25
Small- 25 x 8 = 200
Difference- 200 - 25 = 175 more small plates than large plates
List all of the factors of 32
1, 32, 2, 16, 3, 4, 8
A rectangle has a length of 8 inches and a width of 6 inches. What is the PERIMETER?
P = L + L + W + W
8 + 8 + 6 + 6 = 28 inches
Give an example of a PRIME number between 5 and 20
2, 3, 5, 7, 11, 13, 17, 19
59 ÷ 6
9 R5
The playground has 35 feet of track. The park has 7 times are many feet of track. How many feet of track do the playground and park have in all?
Playground- 35
Park- 35 x 7 = 245
In All- 280 feet of track in all
List all the factors of 36
What is the greatest multiple of 3 that is less than 25.
3, 6, 9, 12, 15, 18, 21, 24, 27
Greatest multiple is 24