Prime, Composite, or Neither?
2
Prime (the only even prime)
What is the prime factorization of 12?
2 x 2 x 3
What does GCF stand for?
Greatest Common Factor
What does LCM stand for?
Least Common Multiple
What is the square root of 81?
7
Prime
Which number's prime factorization is:
2 x 2 x 5 x 5
100
Factors of 20: 1, 2, 4, 5, 10, 20
Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
What is the GCF of 20 and 30?
10
Multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48...
Multiples of 14: 14, 28, 42, 56, 70, 84...
What is the LCM of 6 and 14?
42
122 = ?
144
21
Composite
What is the prime factorization of 32?
2 x 2 x 2 x 2 x 2
or 25
What is the GCF of 12 and 16?
4
What is the LCM of 2 and 10?
10
23 = ?
8
97,538
Composite
What is prime factorization of 40?
2 x 2 x 2 x 5
What is the GCF of 24 and 40?
8
What is the LCM of 9 and 12?
36
List the next 4 perfect squares:
1, 4, 9, 16, ____ , ____ , ____ , ____
25, 36, 49, 64
1
Neither Prime Nor Composite
1 is the only positive whole number that is neither prime nor composite. It is the unit (or counting) number.
What is the prime factorization of 51?
3 x 17
What is the GCF of 27 and 90?
9
What is the LCM of 7 and 13?
91
What are two consecutive numbers whose squares add up to 61?
5 and 6