The prime numbers between 10 and 20 are
11, 15, 17, 19
11, 13, 17, 19
11, 16, 17, 19
11, 13, 19
28 is a _________ number.
Odd
Prime
Composite
None of these
All numbers ending in 1, 3, 5, 7 or 9 are _________ numbers.
Even
Which of the following is a composite number?
19
23
43
55
13 is a _________ number
Numbers that have more than two factors are called _________ numbers.
Of the following, twin prime numbers are
13, 17
19, 21
23, 25
17, 19
Numbers that have only two factors are called ________ numbers.
Number of prime numbers between 20 and 30 is
1
2
3
4
Which of the following is a prime number
21
29
33
45
