Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 17)
17.
The smallest 3 digit prime number is:
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.
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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