Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:
The smallest three-digit prime number is
(a)101
(b)103
(c)107
(d)None of these
Answer
Answer (as printed): A
Explanation
Clearly, 100 is divisible by 2 . So, 100 is not prime. $(101)<(11)^{2}$ and prime numbers less than 11 are 2, 3, 5, 7. Clearly, 101 is not divisible by any of 2, 3, 5 and 7. Hence, 101 is the smallest 3-digit prime number.
Explanation as extracted from the printed page; notation may be imperfect.