Question
Which of the following are prime numbers? $331$
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Answer
A number between $100$ and $200$ is a prime number if it is not divisible by any prime number less than $15.$
Similarly, a number between $200$ and $300$ is a prime number if it is not divisible by any prime number less than $20.$
$331$ is a prime number, because it is not divisible by $2, 3, 5, 7, 11, 13, 17$ and $19.$
Similarly, a number between $200$ and $300$ is a prime number if it is not divisible by any prime number less than $20.$
$331$ is a prime number, because it is not divisible by $2, 3, 5, 7, 11, 13, 17$ and $19.$
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