#include<bits/stdc++.h>
using namespace std;
int main() {
	int T;
	cin>>T;
	while(T--) {
		double d,t;
		double s1=11,s2=11;
		cin>>d>>t;
		s1+=2*t/5;
		s2+=2.5*t/4;
		if(d>3&&d<=10) {
			s1+=2*(d-3);
			s2+=2.5*(d-3);
		} else if(d>10) {
			s1+=2*7+3*(d-10);
			s2+=2.5*7+3.75*(d-10);
		}
		double r=(int)(s2+0.5)-(int)(s1+0.5);
		printf("%.0f\n",r);
	}
	return 0;
}