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Q.

The number 23 is:
A) A prime number
B) A real number
C) An irrational number
D) A rational number
 



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a

A, B, D are correct

b

A, B, C are correct

c

B, C, D are correct

d

A, C, D are correct 

answer is A.

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Detailed Solution

Concept: We have the following: 23
We can categorically state that 23 is a whole number.
Writing a whole number in the product of its prime factors is known as "prime factorization" of the number.
23 has the prime factorization 1×23.
Therefore, the sole variables of 23 are 23 and 1.
We can therefore conclude that 23 is a prime number based on the definition of prime numbers.
Hence, the correct option is 1.
 
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The number 23 is:A) A prime numberB) A real numberC) An irrational numberD) A rational number