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WorksheetsIdentify Prime
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
What is a prime number?
a)
A number with 1 factor
b)
A number with 2 factors
c)
A number with 3 factors
d)
2 factors (1 and itself)
2.
What do we call a number that is not prime?
a)
Computer
b)
Composite
c)
Complain
d)
Company
3.
Why is 1 neither prime or composite?
a)
It only has one factor
b)
It has three factors
c)
It isn't a number
d)
It is too close to 2
4.
Complete the missing prime numbers: 1, 3, 5, 7, 11, 13
a)
17, 19
b)
15,17,19
c)
18, 19
d)
17, 19, 20
5.
Which factors prove that 4 is not a prime number?
a)
1, 2, 3, 4
b)
1, 4, 5
c)
1, 2
d)
1, 2, 4
6.
Which factors prove that 29 is a prime number?
a)
2, 29
b)
1, 29
c)
1, 2, 13, 29
d)
29
7.
Which factors prove that 16 is a composite number?
a)
1, 2, 4, 8, 16
b)
1, 2, 16
c)
1, 2, 8, 16
d)
1, 3, 4, 9,
8.
Which of these is a prime number?
a)
33
b)
34
c)
35
d)
37
9.
Which of these is a prime number?
a)
41
b)
42
c)
44
d)
49
10.
Tom thinks of the number 100. What is the next prime number after 100?
a)
101
b)
102
c)
105
d)
110
11.
Why is 15 not a prime number?
a)
3x5
b)
2x5
c)
3x15
d)
10+5
12.
Which reason explains why 63 is not a prime number?
a)
It is an odd number
b)
It is in the 3 times table
c)
63x1
13.
Which factors prove that 17 is prime
a)
1, 17
b)
1, 2, 10, 17
c)
1, 6, 17
d)
17
14.
Complete the missing prime number 3, 5, __, 11, 13
a)
7
b)
8
c)
9
d)
10
15.
Complete the missing prime number: 13, 17, ____, 23, 29
a)
19
b)
18
c)
20
d)
21
16.
All prime numbers are ODD except for...
a)
2
b)
4
c)
6
d)
8
17.
Is 50 a prime number?
a)
Yes
b)
No
18.
Is 10 a prime number?
a)
Yes
b)
No
19.
Is 35 a prime number?
a)
Yes
b)
No
20.
Is 31 a prime number?
a)
Yes
b)
No
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