Question
Which one of the following is a prime number ?
Answer: Option E
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`sqrt(551)` > 23
All prime numbers less than 23 are 2, 3, 5, 7, 11, 13, 17, 19.
119 is divisible by 7; 187 is divisible by 11;247 is divisible by 13 and 551 is divisible by 19.
So, none of the given numbers is prime
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