Competititve Exams Materials
(Q) How many of the integers between 110 and 120 are prime numbers ?
A) 2
B) 4
C) 1
D) 3
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 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.
B) 4
C) 1
D) 3
View Answer
C) 1Explanation :
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 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.
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Aptitude : Number System
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