Prime Numbers
Which one of these numbers is a prime number?
7 or 39
7?
Composite numbers have more than ______ factors.
two
What is the highest common factor of 8 and 24?
8
What are the prime factors of 12?
3 x 2 x 2
What is 3 x 3 x 4 x 4 x 3 in index notation?
33 x 42
This prime number is a factor of 4
2
When you add this composite number to the prime number 7 you get a prime number, 13
6
What is the lowest common multiple of 8 and 5?
40
What are the prime factors of 28?
7 x 2 x 2
Expand 53 x 64
5 x 5 x 5 x 6 x 6 x 6 x 6
13 or 21
13
Which one is a composite number?
41 or 39
41
What is the highest common factor of 16, 12 and 72?
4
What is the prime factorization of 36?
3 x 3 x 2 x 2
What is the square root of 162?
When cubed, this prime number equals 27. (x3)
3
When you square 5, you get this composite number.
25
What is the lowest common multiple of 16 and 36?
144
What is the prime factorization of 56?
7 x 2 x 2 x 2
Estimate the whole numbers either side of the square root of 39.
6 and 7...ha!
31 or 81
31
When you cube 4, you get this composite number.
64
What is the highest common factor of 18, 81 and 144?
9
What is the prime factorization of 72?
2 x 3 x 2 x 2 x 3
24 x 7