Question

4.
Which of the following is not a prime nor a composite number?
a) 1
b) 2
c)51
d)None of these​

Answer 1

Answer:

A prime number is that number which has only two factors-1 and the number itself. For example:- 5,7,11,13 etc.

A composite number is such a number which has more than two factors. For example:- 4,15,6,25 etc.

The answer of your question is: option a) 1.

This is so because 1 is the only number which has only one factor that is itself.

Due to this property of 1, it is also called the unique number.

I hope you got your answer.

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