import java.io.*;
import java.util.*;

public class Sinterklaas
{
    public static void main(String[] args)
    {
	Scanner in = new Scanner(System.in);
	PrintStream out = System.out;

	int N = in.nextInt();
	for (int n = 0; n < N; n++)
	{
	    int p = in.nextInt();
	    int s = in.nextInt();
	    out.println(s % p + 1);
	}
    }
}