Multiples/Factors
Name three multiples of 6.
Is 3 a prime or a composite number? How do you know?
3 is a composite number. Its only factors are 1 and 3.
Ms. Greenberg has 150 new books for the three fourth grade classes. How new books can each class get?
Each class can get 50 books.
What is the product of 20 x 32?
The product is 640.
Ms. Harvey's living room has a rectangular rug. The length is 8 feet and the width is 5 feet. What is the perimeter of the rug?
Name three multiples of 15.
15, 30, 45, 60. . .and more
List two composite numbers.
4, 6, 8, 9. . .And more.
Mr. Gilligan bought 280 notebooks. He wanted to split them equally between 4 classes. How many notebooks would each class get? Will there be any notebooks left over?
Each class will get 70 notebooks. There won't be any notebooks left over.
Mr. Gilligan bought 24 boxes of donuts for the teachers. Each box has 12 donuts in it. How many donuts will the teachers get to enjoy today?
The teachers will enjoy 288 donuts.
It's field day! The kids are playing on a field with a width of 32 square feet and a length of 48 square feet. How many square feet do the kids have to play in?
They have 1,536 feet to play in.
What is the greatest multiple of 4 that is less than 15?
12.
List three prime numbers.
2, 3, 7. . .and more.
What is the quotient of 8,016 / 4?
2,004.
The donut factory is open all day long. They churn out 300 donuts an hour. How many could they make in a a full day?
300 donuts x 24 hours in a day = 7,200 donuts
The auditorium has an area of 5,500 square feet. What could be the length of the auditorium? What could be the width?
100 x 55
550 x 10
True or false: 4 is a multiple of 4. Explain how you know.
True because 4 x 1 = 4.
Can a number be both prime and composite? Why or why not?
A number cannot be both prime and composite. A prime number only has two factors, but a composite has multiple factors.
What is the quotient of 3,626 / 5?
The quotient is 725 R 1.
Mr. Gilligan wants to put a new floor in the cafeteria. The floor is 29 feet long and 22 feet wide. Ms. Wanda said they need about 300 square feet of tile. Is this answer reasonable? Why or why not?
This answer isn't reasonable. 29 is close to 30. 22 is close to 20. 20 x 30 = 600.
The area of a cricket tank is 30 square inches. The perimeter is 26 inches. What is the length and width of the tank?
Length= 10 inches
Width= 3 inches
1 x 36
2 x 18
3 x 12
4 x 9
A "greatest common factor" is the largest factor that two numbers share.
What is the greatest common factor of 32 and 64?
45 pencils come in a box. Ms. Ford and Ms. Lempesis share four boxes equally. How many pencils does each teacher receive?
Each teacher receives 90 pencils.
45 pencils x four boxes = 180 pencils
180 pencils / 2 teachers = 90 pencils each
There are three numbers for the combination to the teachers' closet. The first number is 15. The other two numbers can be multiplied together to get a product of 32. What are the possibilities of the other two numbers?
2 x 16 = 32
8 x 4 = 32
The area of a swimming pool is 42 square feet. The perimeter is 26 feet. What is the length and width of the pool?
Length= 7 feet
Width= 6 feet