#include<cstdio>
#include<iostream>
#include<cstring>
#include<cmath>
#include<cstdlib>
#include<algorithm>
#include<vector>
#include<map>
#include<set>
using namespace std;
int main ()
{
	int T;
	scanf("%d",&T);
	while(T--)
	{
		int d,t;
		double q=0.00,w=0.00;
		scanf("%d%d",&d,&t);
		if(d<=3)
		{
			q=q+10;
			w=w+11;
		}
		else if(d>3&&d<=10)
		{
			d=d-3;
			q=q+10+d*2;
			w=w+11+d*2.5;
		}
		else if(d>10)
		{
			d=d-10;
			q=q+10+14+3*d;
			w=w+11+2.5*7+3.75*d;
		}
		q=q+1.00*t/5*2+1;
		q=floor(q+0.5);
		w=w+1.00*t/4*2.5;
		w=floor(w+0.5);
		printf("%d\n",int(w)-int(q));
	}
}