Multiples
What are multiples?
Multiples are the list of products of a certain number.
What are factors?
Factors are numbers multiplied together to get a product.
What are common multiples?
Multiples that are the same or shared between two or more numbers.
What are common factors?
Factors that are the same or shared between two or more numbers.
What is a prime number?
A number that has only two factors: 1 and itself.
List the first ten multiples of 8.
8, 16, 24, 32, 40, 48, 56, 64, 72, 80
What are all the factors of 6?
1, 2, 3, 6
Find the least common multiples of 4 and 6.
12
Find the greatest common factor between 10 and 20.
10
What is a composite number?
A number that has more than two factors.
Which of the following numbers are multiples of 3?
64, 78, 93, 100
Answers:
78, 93
What are all the factors of 36?
1, 2, 3, 4, 6, 9, 12, 18, 36
What is the least common multiple of 2 and 7?
14
Find the greatest common factor between 24 and 30.
6
Are all odd numbers prime numbers as well?
If yes, explain why and give an example.
If no, explain why and give an example.
No, because some prime numbers have 2 or more factors.
Examples: 15, 21, 25, 27...
Which of the following numbers are multiples of 6?
28, 67, 84, 91, 96
Answers:
84, 96
What are the factors of 20?
1, 2, 4, 5, 10, 20
Is 42 a common multiple of 2 and 5?
No, because 42 is a multiple of 2 but not a multiple of 5.
Find the greatest common factor of 36 and 42
6
Identify the prime numbers in the list:
3, 15, 19, 23, 33, 40
Prime Numbers: 3, 19, 23
List the first 12 multiples of 7.
7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84
What are the factors of 75?
1, 3, 5, 15, 25, 75
Is 96 a common multiple of 3 and 2?
Yes, because when you skip count by 3's and 4's, 96 is in their list.
What are all the common factors of 35, 37, and 90?
1 is the only common factor of 35, 37, and 90.
Identify the composite numbers in the list:
9, 17, 22, 48, 53, 61
Composite Numbers : 9, 22, 48