WorksheetsPrime Factors
Total questions: 20
Worksheet time: 3600secs
The prime factors of 36 are
2 and 3
2, 3 and 6
1, 2 and 3
2, 3, 6 and 12
What are the prime factors of 144?
2, 3 and 5
2, 4 and 8
2 and 3 only
3, 5 and 6
What are the prime factors of 120?
2, 3 and 5
2, 4 and 8
2 and 3 only
3, 5 and 6
What are the prime factors of 700?
2, 3 and 5
2 and 7 only
2, 5 and 7 only
3, 5 and 7
What are the prime factors of 390?
3 and 5
2, 3 and 5
2, 5 and 8
2, 3, 5 and 13
What are the prime factors of 240?
3 and 5
2, 3 and 5
2, 5 and 8
2, 3, 5 and 12
The prime factors of 132 are
2 and 3
2, 3 and 6
1, 2 and 3
2, 3, and 11
Which of the following sets of numbers consist of all prime numbers?
1, 2, 3 and 5
2, 3 and 8
2, 5, 7 and 10
5, 11, 13 and 17
Which of the following sets of numbers consist of all prime numbers?
4, 5 and 10
2, 13 and 5
12, 15, 27 and 30
5, 12, 13 and 27
Which of the following numbers have the same unique prime factors as 72?
100
6
10
20
Which of the following numbers have the same unique prime factors as 120?
30
6
10
20
Which of the following numbers have the same unique prime factors as 64?
6
4
20
12
Which of the following numbers have the same unique prime factors as 81?
3
6
72
14
Which of the following numbers have the same unique prime factors as 729?
6
3
18
20
Which of the following numbers have the same unique prime factors as 2400?
18
30
10
20
What is the sum of all prime numbers between 20 and 40?
186
120
250
198
What is the sum of all prime numbers between 40 and 50?
131
217
250
175
What is the sum of all prime numbers between 1 and 10?
13
17
20
15
How many prime numbers are there between 1 and 20?
5
8
9
10
The sum of all prime numbers between 1 and 20 is :::
70
77
65
125
