Multiples
What are the next five multiples of 5?
5, 10, 15, 20, 25
What factors of 28 am I missing?
__, 2, 4, ___, 14, 28
1, 2, 4, 7, 14, 28
Is the number 2 prime or composite?
Prime
Find the prime factors of 8?
Draw a factor tree
2x2x2=8
What is the difference between a prime and composite number?
A prime number has only two factors - 1 and itself
A composite number has more than two factors.
What are the next five multiples of 10?
10, 20, 30, 40, 50
What are the factors of 12?
1, 2, 3, 4, 6, 12
Is the number 9 prime or composite?
Composite
Find the prime factors of 21?
Draw a factor tree
3x7=21
I have 20 chocolate bars and I want to give them to 5 friends. How many can I give to each friend so they have the same amount and none left over.
4 chocolate per friend
What are the next 5 multiples of 12?
12, 24, 36, 48, 60
What are the factors of 19?
1 x 19
Is the number 23 prime or composite?
Prime
Find the prime factors of 12?
Draw a factor tree
2x2x3=12
Mrs. Tremblay thinks that 21 is a prime number because it is odd. Is she correct? Why or why not?
21 is NOT a prime number because 3x7=21.
Which of the following is a multiple of 6?
72 , 44 , 61 , 80
72
What are the factors of 24?
1, 2, 3, 4, 6, 8, 12, 24
Is the number 27 prime or composite?
Composite
Find the prime factors of 45?
Draw a factor tree
5x3x3=45
Bus A arrives at its stop every 10 minutes. Bus B arrives at its stop every 8 minutes. If they both leave their bus stops now, how many minutes until they arrive at the same time again?
40 minutes
Which of the following is NOT a multiple of 13?
26 , 52 , 91 , 66
66
What are the factors of 48?
1, 2, 3, 4, 6, 8, 12, 16, 24, 48
What are the first 8 prime numbers?
2, 3, 5, 7, 11, 13, 17, 19
Find the prime factors of 68?
Draw a factor tree
2x2x17=68
What is the Greatest Common Factor between 24 and 36?
12