Example not clear

#1

From 1 through 10. I see only 3 values (6, 8,10) that have 2 divisors other than the squares (4, 9) . Please clarify why the expected output is 4

#2

In this question, you are supposed to print the no of prime no.s between 2 given nos a and b. Thus between 1 and 10, we have 4 prime nos as : 2, 3,5 and 7

#3

The question is misleading.I interpreted it as Prime Minister visits countries whose number that has exactly 2 divisors. Kindly update the statement below.

PMO gives two random numbers a & b to the Prime Minister. PM Modi wants to visit all countries between a and b (inclusive) , However due to shortage of time he can’t visit each and every country , So PM Modi decides to visit only those countries,for which country number has two divisors. So your task is to find number of countries Mr. Modi will visit.

#4

Please review my code at : https://ide.codingblocks.com/s/109289 I am getting a run-error for TC #3

#5

Use size as long long int p[1000000] and also
long long int N=1000000;
long long int p[N];
primeseive(p,N);