Primes and Composites
Name 3 prime numbers.
(Answers will vary: 2, 3, 5, 7, 11, 13, 17, 19...)
List the factors of 6:
___, ____, ____, ____
1, 2, 3, and 6
Which is NOT a factor of 4?
A. 1
B. 2
C. 3
D. 4
C. 3
Determine the 4th term in the pattern.
First term: 2
Rule: add 2
8
How many factors do prime numbers have?
2
List the factors of 12:
____, _____, _____, _____, _____, _____
1, 2, 3, 4, 6, 12
Which is NOT a factor of 20?
A. 5
B. 10
C. 15
D. 20
C. 15
What is the least common multiple of 3 and 4.
12
Determine the 4th term in the pattern.
First term: 5
Rule: add 3, subtract 1
10
Is 20 a prime or composite number?
Composite
List 4 factors of 100:
Five of the following: 1, 2, 4, 5, 10, 20, 25, 50, 100
Which is NOT a factor of 40?
A. 2
B. 5
C. 8
D. 9
D. 9
Write the greatest common factor of 8 and 20.
4
Determine the 4th term in the pattern.
First term: 3
Rule: multiply by 2
24
What is the smallest prime number?
2
Is 11 a factor of 44? Explain why or why not.
Yes, because if we count by 11's we reach 44:
11, 22, 33 44
Which is NOT a factor of 50?
A. 3
B. 5
C. 10
D. 25
A. 3
Find the least common multiple of 6 and 8.
24
Determine the 4th term in the pattern.
First term: 25
Rule: subtract 10, add 15
20
Is 500 prime or composite? Why?
Composite, because it has more than 2 factors
(2, 5, 10, 100, etc.)
List ALL the factors of 30.
1, 2, 3, 5, 6, 10, 15, 30
Which 2 numbers are NOT factors of 60?
9
10
11
12
9 and 11
write 2 common multiples of 6 and 4.
12, 24, 48
Determine the 4th term in the pattern.
First term: 400
Rule: divide by 2
50