Aptitude - Numbers - Discussion

Discussion Forum : Numbers - General Questions (Q.No. 17)
17.
The smallest 3 digit prime number is:
101
103
109
113
Answer: Option
Explanation:

The smallest 3-digit number is 100, which is divisible by 2.

100 is not a prime number.

101 < 11 and 101 is not divisible by any of the prime numbers 2, 3, 5, 7, 11.

101 is a prime number.

Hence 101 is the smallest 3-digit prime number.

Discussion:
22 comments Page 3 of 3.

Suparna said:   1 decade ago
Is this method can be applied in every case?

Sharat J said:   1 decade ago
I am doing this in even simplest way.

101=1+0+1=2 //prime number.

103=1+0+3=4 //not prime number.

109=1+0+9=10 //not prime number.

113=1+1+3=5 //prime number.

But, 2 is small then 5 so the answer is 101.


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