Prime, Composite, or Neither?
2
Prime (the only even prime)
I am not a prime number.
One of my factors is 3.
I am even.
I am not a multiple of 4.
Who am I? 3, 6, 10, 12, 15, 17, 20, or 25
6
The numbers below are all multiples of which number?
20, 15, 40, 25
5
32, 24, 16, 42
42
122 = ?
144
7
Prime
I am less than 5 squared.
I am a factor of 30.
I am a multiple of 5.
I am odd.
Who am I? 3, 6, 10, 12, 15, 17, 20, or 25
15
I am a multiple of 3.
I am between 40 and 50.
What numbers could I be?
42, 45, 48
Find a multiple of 6 between 40 and 50.
42 or 48
What is the square root of 81?
9
21
Composite
I am a composite number.
I am a multiple of 4.
I am a factor of 100.
I am not a multiple of 10.
Who am I? 4, 5, 8, 10, 12, 20, 24, 32
20
The numbers below are all multiples of which number?
24, 15, 30, 9
3
Which of the following are factors of 32:
8, 3, 16, 4, 6
8, 16, 4
23 = ?
8
97,538
Composite
I am a factor of 120.
I am a multiple of 2.
I am a multiple of 3.
I am 1 away from a multiple of 5
Who am I? 4, 5, 8, 10, 12, 20, 24, 32
24
I am between 50 and 70.
What numbers could I be?
56 or 64
Which of these numbers has exactly 4 factors:
20, 27, 12, 25
27
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.
I am a composite number.
I am a multiple of 4.
I am a multiple of 8.
I am a factor of 160.
Who am I? 4, 5, 8, 10, 12, 20, 24, 32
32
I am a multiple of 6.
I am a multiple of 4.
I am less than 30.
Who am I?
12 or 24
What is the LCM of 7 and 13?
91
What are two consecutive numbers whose squares add up to 61?
5 and 6