. The smallest prime number is


A: 1

B: 2

C: 3

D: 4

 

 

Best Answer

Explanation:-

A prime number is a number whose factors are 1 and the number itself. 

So first find how many of the given options are prime numbers by finding their factors. 

If their factors have 1 and the number itself, then those numbers are primes.

To find the smallest prime number from the given options.

A.1.

 1 is an odd number and 1 has only one factor that is 1 itself. 

1 is not a prime number as well as not a composite number.

B. 2 

2 is an even number and 2 have two factors : 1 and 2. 

As 2 have only two factors, it is a prime number.

C.3

 3 is an odd number and 3 also have two factors : 1 and 3. 

As 3 also have only two factors, it is also a prime number.

D.4. 

4 is an even number and 4 have three factors : 1, 2 and 4. 

As 4 has three factors it is not a prime number. 4 is a composite number.

So finally we got two prime numbers, they are 2 and 3.

2 is smaller than 3.

Therefore, 2 is the smallest prime number.

Final answer:-

So, the correct answer is “Option B” i.e. 2

 

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