Is it prime or Composite?
21
What is Composite
16
What is 2
15
What is 1, 3, 5 and 15
39
What is 3 and 13
1 is a composite number.
False
31
What is Prime
30
What is 2, 3 and 5
18
What is 1, 2, 3, 6, 9 and 18
7
What is none
A prime number always only has 2 factors, which are 1 and itself.
True
41
What is Prime
60
What is 2, 3 and 5
59
What is 1 and 59
12
What is 2, 3, 4, 6 and 12
1 is a factor of every number.
True
51
What is Composite
42
What is 2, 3 and 7
30
What is 1, 2, 3, 5, 6, 10, 15 and 30
27
What is 3, 9 and 27
Prime numbers have no proper factors.
What is True
5.1
What is neither
210
What is 2, 3, 5 and 7
49
What is 1, 7 and 49
13
What is none
Are their infinitely many prime numbers.
What is True