PREP DS1-84（未搜索到）

wawadream

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 3912;

The answer is D.

我纠结于2）。万一1-3912之间的质数的个数不是个质数，比如是200个，可是原题说p is a prime number，这岂不是矛盾啦！

呵呵，把1-3912之间的质数过一遍肯定不现实，请nn们指点一下思路。灰常灰常感谢！！！

scorpio2rd

I think you think too much. From the question, P is a prime number. Then, it doesn't have a chance to have a situation that you mentioned.