Quiz: Prime & Factors Quiz


Prime & Factors QuizOnline version Prime numbers and factors game by ANUP SINGH 1 What is a prime number? a Has exactly two even factors b Can be divided by any number c Only divisible by 1 and itself d Is a multiple of every number 2 Which is a factor of 36? a 9's digit sum is 9 b 6 c 11 d 7 3 Which number is a multiple of 9? a 27 b 4 c 13 d 25 4 What is the HCF (GCD) of 24 and 36? a 24 b 6 c 18 d 12 5 What is the LCM of 14 and 20? a 28 b 140 c 34 d 60 6 Are 8 and 15 coprime (co-prime)? a No, gcd is 8 b They share factor 5 c No, gcd is 4 d Yes, gcd is 1 7 Prime factorisation of 60 is? a 3 × 20 b 2 × 3 × 5 c 2 × 2 × 15 d 2^2 × 3 × 5 8 Which statement is true? a If a is a multiple of b, then a is a factor of b b Factor and multiple are the same c Every number is a multiple of 1 d If a is a factor of b, then b is a multiple of a 9 What is a common multiple of 3 and 5? a 8 b 7 c 15 d 9 10 Smallest prime factor of 91? a 7 b 11 c 13 d 17 Feedback 1 Prime numbers have exactly two distinct positive factors: 1 and the number itself. 2 6 × 6 = 36, so 6 is a factor; 7, 11 are not factors of 36. 3 A multiple of 9 is 9 × n; 27 = 9 × 3. 4 Common factors: 1,2,3,4,6,12; largest is 12. 5 LCM is the smallest common multiple; 140 is divisible by 14 and 20. 6 8 and 15 share no common prime factors; gcd = 1. 7 60 = 2 × 2 × 3 × 5, i.e., 2^2 × 3 × 5. 8 A factor of b means b is a multiple of that factor. 9 Common multiples include 15, 30, 45, etc.; 15 is the smallest positive one. 10 91 = 7 × 13; smallest prime factor is 7.

1

What is a prime number?

a

Has exactly two even factors

b

Can be divided by any number

c

Only divisible by 1 and itself

d

Is a multiple of every number

2

Which is a factor of 36?

a

9's digit sum is 9

b

6

c

11

d

7

3

Which number is a multiple of 9?

a

27

b

4

c

13

d

25

4

What is the HCF (GCD) of 24 and 36?

a

24

b

6

c

18

d

12

5

What is the LCM of 14 and 20?

a

28

b

140

c

34

d

60

6

Are 8 and 15 coprime (co-prime)?

a

No, gcd is 8

b

They share factor 5

c

No, gcd is 4

d

Yes, gcd is 1

7

Prime factorisation of 60 is?

a

3 × 20

b

2 × 3 × 5

c

2 × 2 × 15

d

2^2 × 3 × 5

8

Which statement is true?

a

If a is a multiple of b, then a is a factor of b

b

Factor and multiple are the same

c

Every number is a multiple of 1

d

If a is a factor of b, then b is a multiple of a

9

What is a common multiple of 3 and 5?

a

8

b

7

c

15

d

9

10

Smallest prime factor of 91?

a

7

b

11

c

13

d

17

Feedback

1

Prime numbers have exactly two distinct positive factors: 1 and the number itself.

2

6 × 6 = 36, so 6 is a factor; 7, 11 are not factors of 36.

3

A multiple of 9 is 9 × n; 27 = 9 × 3.

4

Common factors: 1,2,3,4,6,12; largest is 12.

5

LCM is the smallest common multiple; 140 is divisible by 14 and 20.

6

8 and 15 share no common prime factors; gcd = 1.

7

60 = 2 × 2 × 3 × 5, i.e., 2^2 × 3 × 5.

8

A factor of b means b is a multiple of that factor.

9

Common multiples include 15, 30, 45, etc.; 15 is the smallest positive one.

10

91 = 7 × 13; smallest prime factor is 7.

You can integrate the game into an LMS compatible with LTI 1.1 or LTI 1.3 such as Canvas, Moodle, or Blackboard. This way, the scores will be automatically saved into the platform’s gradebook.

Prime & Factors Quiz

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Prime & Factors QuizOnline version

by ANUP SINGH

What is a prime number?

Which is a factor of 36?

Which number is a multiple of 9?

What is the HCF (GCD) of 24 and 36?

What is the LCM of 14 and 20?

Are 8 and 15 coprime (co-prime)?

Prime factorisation of 60 is?

Which statement is true?

What is a common multiple of 3 and 5?

Smallest prime factor of 91?

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