Aptitude - Numbers - Discussion

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"Nothing in life is to be feared, it is only to be understood."

- Marie Curie

Which of the following is a prime number ?

[A].	33	[B].	81
[C].	93	[D].	97

Answer: Option D

Explanation:

Clearly, 97 is a prime number.

Jagadeesh said: (Sat, Oct 16, 2010 04:53:36 AM)

Please explain, how 97 is prime number ?.

Balram said: (Fri, Oct 22, 2010 11:59:24 PM)

Because it is not disible any other no.

Sundar said: (Wed, Nov 3, 2010 04:42:28 AM)

A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself. The smallest twenty-five prime numbers (all the prime numbers under 100) are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. Note: 1 is not a prime number. Hope this will help you. Have a nice day!

Monty said: (Tue, Feb 8, 2011 11:57:32 AM)

2 is only even in the prime numbers.

Niranjan Nande said: (Mon, Feb 28, 2011 04:22:49 AM)

Please take any perfect square near of 97 i.e 10*10=100. Now find all prime numbers which are less than 10 that are 3,5,7.Now at last check wheather 97 is divisible by 2,3,7.If it is divisible then number is not prime else it is prime.