#include<bits/stdc++.h>
using namespace std;
int q;
int main(){
	cin>>q;
    while(q--){
        int n,k;
	    cin>>n>>k;
	    int mxq=n/k,mir=n-n/k*k;
	    cout<<(mxq-mir+k)/(k+1)<<"\n";
    }
	return 0;
}