Prime Factorization
What is the prime factorization of 12?
2 x 2 x 3 = 12
Is 7 prime or composite?
Prime
What is 7 × 8?
56
Is 11 prime or composite?
Prime
What is the prime factorization of 18?
2 x 3 x 3 = 18
Is 15 prime or composite?
Composite
What is 12 x 6?
72
What is 9x7?
63
Break down the number 30 into its prime factors.
2 x 3 x 5 = 30
This number is the smallest composite number.
4
Solve: 35 × 4
140
What is the prime factorization of 21?
3 x 7
What is the prime factorization of 48?
2 x 2 x 2 x 2 x 3 = 48
Is 29 a prime number?
Yes
If a lunch costs $3.50, how much do 6 lunches cost?
$21.00
Is 49 prime or composite? Explain.
Composite — it equals 7 × 7
Which number has the prime factorization 2 × 2 × 5 × 5?
2 x 2 = 4
4 x 5 = 20
20 x 5 = 100
Name a composite number that has exactly 3 factors.
(Hint: a square of a prime number.)
4, 9, 25, 49… etc.
Solve: 248 × 0.4
99.2
A number has the prime factors 2 × 3 × 3 × 5. What is the number?
90