#include<iostream>
#include<string>
#include<string.h>
#include<algorithm>
#include<iomanip>
#include<limits.h>
#include<stdlib.h>
#include<set>
#include<sstream>
#include<vector>
#include<list>
#include<vector>
#include<map>
#include<stack>
using namespace std;
int Round(double x){
int y=x;
if(x-y>=0.5)return y+1;
else
	return y;
}
int main()
{
	double sum1,sum2;
	int d;
	int T;
	cin>>T;
	while(T--){
	int a,b;
	cin>>a>>b;
	if(a<=3){
	  sum1=10+1+0.4*b;
	  sum2=11+(2.5/4.0)*b;
	}
	if(a>3&&a<=10){
	sum1=11+0.4*b+2*(a-3);
	sum2=11+(2.5/4.0)*b+2.5*(a-3);
	}
	if(a>10){
	sum1=11+0.4*b+14+3*(a-10);
	sum2=11+(2.5/4.0)*b+2.5*7+(a-10)*3.75;
	}
	d=Round(sum2)-Round(sum1);
	cout<<d<<endl;}
return 0;
}