Short Quiz

Question 1 of 5

I am a number divisible by both 5 and 9 . What is the least number I can be?

A 45 B 15 C 90 D 30

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Question 2 of 5

Assertion (A): The number 1 does not have any prime factorisation.
Reason (R): It is not divisible by any prime number.

A Both A and R are true, and R is the correct explanation of A. B Both A and R are true, but R is not the correct explanation of A. C A is true, but R is false. D A is false, but R is true.

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Question 3 of 5

Assertion (A): Any two prime numbers are co-prime.
Reason (R): Composite numbers are defined as whole numbers that have more than two factors.

A Both A and R are true, and R is the correct explanation of A. B Both A and R are true, but R is not the correct explanation of A. C A is true, but R is false. D A is false, but R is true.

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Question 4 of 5

I have two 2 s, one 3 and two 13 s in my prime factorisation. Who am I?

A 2208 B 1560 C 2028 D 312

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Question 5 of 5

What is the common factor of 17,21 and 29 ?

A 17 B 29 C 7 D 1

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