If p is a prime number greater than 2, what is the value of p?
(1) There are a total of 100 prime numbers between 1 and p+1.
(2) There are a total of p prime numbers between 1 and 3,912.
IMO answer is D.
In DS you dont have to calculate the answer but to determine if it is possible to find the answer from given information.
St1: this tells you that p is 100th prime number and certainly possible to calculate.
like 1st prime number is 2, 2nd is 3 and so on
Statutory warning: Trying to canculate it in reat GMAT test can be injurious to health
St2:again it is possible to calculate how manny prime numbers are there between 1 and 3,912............sufficient
DS is actually a time savor since only thing we have to determine is if the given information is sufficient to find an answer.