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Prime numbers - Quiz 1

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Prime numbers and divisibility

Instructions

It can be helpful to print out the quiz and give yourself time to think about the questions. Read each question carefully and choose the answer that you think is most likely to be correct. You can only choose one answer for each question. When you are ready, mark your answers in the spaces on the computer screen (web page).

 Read the instructions carefully and choose the correct answer. 

1.     Choose the correct answer. 

Mark your answer here: Possible answers:
a  2 and 3 are prime numbers.

b

 4 and 7 are prime numbers.
c  3 and 9 are prime numbers.
d  3, 4 and 5 are prime numbers.

 

2.   Choose the correct answer. 

Mark your answer here: Possible answers:
a  5, 9 and 19 are prime numbers.
b  7, 13 and 23 are prime numbers.
c  11, 15 and 19 are prime numbers.
d  11, 13 and 27 are prime numbers.

3.     Choose the correct answer.

Mark your answer here: Possible answers:
a  A prime number is a composite number. 
b  A prime number is divisible by 1 and itself. 
c  A prime number is divisible by 2 and itself. 
d  All odd numbers are prime numbers.

4.     Choose the correct answer.

Mark your answer here: Possible answers:
a  A composite number is always divisible by 2.
b  A composite number is always an even number.
c  A composite number is a product of prime numbers. 
d  A composite number is always divisible by 2 or 3.

5.     The PIN number for a mobile phone is made up of two 2-digit prime numbers.         What could the number be? 

Mark your answer here: Possible answers:
a  1739 (17 - 39)
b  1931 (19 - 31)
c  1387 (13 - 87)
d  1199 (11 - 99)

 

6.   What are the prime factors of the number 10?

Mark your answer here: Possible answers:
a  2 and 5 
b  1 and 10 
c  10 and 1  
d  2, 5 and 4 

 

7.    The number 111 is divisible by what number?

Mark your answer here: Possible answers:
a  11
b   9
c   6
d   3

8.   What are the prime factors of the number 60? 

Mark your answer here: Possible answers:
a  2, 3 and 20
b  3, 4 and 5
c  2, 3 and 10
d  2, 2, 3 and 5                

 

9.    The number 1458 is divisible by what number?       

Mark your answer here: Possible answers:
a   7 
b   8
c   9
d   12

 

10.  The number n = 2×3×5×7+5 

Mark your answer here: Possible answers:
a  is a prime number. 
b  is divisible by 3.
c  is an even number.
d  is not a prime number.

 

Percentage answered correctly =

Correct answers: Your answers: