Prime or Composite?
True or false: 1 is a prime number
False
How many factors can a prime number have?
2
Finish the pattern: 3, 6, 9, 12, ?
15
3 x 4
12
12 x __ = 36
3
Which of the following is a prime number?
22, 128, 15, 11
11
Name 4 factors of 28.
1, 2, 4, 7, 14, 28
Finish the pattern: 2, 4, 8, 16, ?
32
72
__ x 10 = 1000
100
Which is a composite number?
2, 12, 3, 19
12
Which of the following numbers are factors of 18?
7, 3, 12, 6, 18
Finish the pattern: 10, 100, 1000, ?
10,000
16 x 3
48
I am an even number less than 30. Some of my factors are 2, 3, 4, and 6. Neither of my digits are a 1. Who am I?
24
A prime number is...
A number that has only 2 factors
How many different ways can you make 36 using multiplication? How many factors does 36 have?
1 x 36, 2 x 18, 3 x 12, 4 x 9, 6 x 6
Therefore, 36 has 9 factors.
1
27 x 6
162
I am an odd number greater than 30. My digits add to 12. I am not a prime number. Who am I?
39
A composite number is...
A number that has more than 2 factors
Which factors do 24 and 36 have in common?
2, 3, 4, 6, and 12
Finish the pattern: 25, 250, 2500, 25000, ?
250,000
18 x 23
414
I am neither a prime number nor a composite number. My written form has only three letters. Who am I?
1