How many of the integers between 110 and 120 are prime numbers? · ABC26GN0126
Subject: General Aptitude · Chapter: Number System · Exam: M.B.A. 2006
How many of the integers between 110 and 120 are prime numbers?
(a)0
(b)1
(c)2
(d)3
(e)4
Answer
Answer (as printed): B
Explanation
Each one of 112, 114, 116, 118 is divisible by 2. So, none is prime. Each one of 111, 114, 117 is divisible by 3. So, none is prime. Clearly, 115 is divisible by 5. So, it is not prime. Each one of 112 and 119 is divisible by 7. So, none is prime. Hence, there is only 1 prime number between 110 and 120, which is 113.
Explanation as extracted from the printed page; notation may be imperfect.