Divisibility Rules
This number divides evenly into all even numbers.
What is 2.
A number that has exactly two factors, one and itself, is called a __________.
What is a prime number.
What is the definition of a factor?
The numbers multiplied together to create a product.
What is the GCF of 36 and 48?
12
18,21,24, and 27 are multiples of ____?
3
Find the LCM for 7 and 9.
63
This number divides evenly into all numbers that end with 5 and 0.
What is 5.
This number is the only even prime number.
2
List the factors of the number 24.
1, 2, 3, 4, 6, 8, 12, 24
The GCF between 30 and 25.
What is 5.
What are the first 5 multiples of 12?
12, 24, 36, 48, 60
Find the LCM for 12 and 15
60
What is the rule to determine if the number is divisible by 3?
Find the sum of the digits and determine if that sum is a multiple of 3.
What are the first 5 prime numbers?
2, 3, 5, 7, 11.
List the factors of the number 81.
1, 3, 9, 27, 81
Paul has 16 fish pictures and 12 deer pictures to display. He wants to arrange the pictures in rows with the same numbers of fish and of deer pictures in each row. What is the greatest number of rows Paul can display?
4 rows
What is the definition of a multiple and how can we determine multiples?
The products of a number. Can be found with skip counting.
You buy a lily and a violet on the same day. You are instructed to water the lily every 4th day and water the violet every 7th day after taking them home. What is the first day on which you will water both plants on the same day?
28th Days
These are the two numbers that both need to evenly divide into a number to make the number also divisible by 6.
2 and 3
This number is the only whole number that is neither prime, nor composite.
What is 1.
List the factors for the number 13.
1, 13
The middle school band has 56 members. The high school band has 96 members. The bands are going to march one after the other in a parade. The director wants to arrange the bands into the same number of columns. What is the greatest number of columns in which the two bands can be arranged if each column has the same number of marchers?
8 columns
What are the first 7 multiples of 8?
8, 16, 24, 32, 40, 48, 56
Molly does ten sit-ups every 3 hours and fifteen push-ups every 2 hours. She does 10 sit-ups and 15 push-ups at 8am. In how many hours will she have to do both again at the same time?
every 6 hours she will do both, so 2 PM
2 3 4 5 6 7 8 9
2, 3, 6, 9
Is 91 a prime or composite number?
Composite
1, 7, 13, 91
List the factors of 60.
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Megan has 30 brownies and 42 cupcakes to package. She wants to put the same numbers of brownies and of cupcakes in each box. What is the greatest number of boxes she can make? How many cupcakes and how many brownies will each box contain?
6 boxes
each box will have 5 brownies and 7 cupcakes.
Are multiples of odd numbers always odd?
No. An odd x odd = odd but an odd x even = even.
Hotdogs are sold in packages of 6. Buns are sold in packages of 8. What is the least number of hotdogs and buns that should be bought to have an equal amount of each?
24