import java.awt.Point;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.StringTokenizer;

class DEC15Long2 {
	public static void main(String[] args) throws NumberFormatException,
			IOException {
		// TODO Auto-generated method stub
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter log = new BufferedWriter(new OutputStreamWriter(System.out));
		int i = Integer.parseInt(br.readLine());
		for (int j = 0; j < i; j++) {
			int N = Integer.parseInt(br.readLine());
			double[][] Store = new double[N][3];
			StringTokenizer st;
			double[] slopes = new double[N];
			double[] intercepts = new double[N];
			
			for (int k = 0; k < N; k++) {
				st = new StringTokenizer(br.readLine());
				Store[k][0] = Integer.parseInt(st.nextToken());
				Store[k][1] = Integer.parseInt(st.nextToken());
				Store[k][2] = Integer.parseInt(st.nextToken());
				if (Store[k][1] != 0) {
					slopes[k] = -Store[k][0] / Store[k][1];
					intercepts[k] = -Store[k][2] / Store[k][1];
					if (Store[k][0] == 0.0) {
						slopes[k] = 0.0;
					}
				} else {
					slopes[k] = -0.0;
					intercepts[k] = -Store[k][2] / Store[k][0];
				}
			}
			
			List<Point.Double> points = new ArrayList<Point.Double>();
			for (int m = 0; m < N; m++) {
				points.add(new Point.Double(slopes[m], intercepts[m]));
			}
			Collections.sort(points, new Comparator<Point.Double>() {
				public int compare(Point.Double x1, Point.Double x2) {
					int result = Double.compare(x1.getX(), x2.getX());
					if (result == 0) {
						result = Double.compare(x1.getY(), x2.getY());
					}
					return result;
				}
			});
			int ans = 1;
			int tempans = 1;
			for (int m = 1; m < N; m++) {
				if (points.get(m - 1).getX() == points.get(m).getX()) {
					if ((1 / points.get(m - 1).getX()) < 0.0 && (1 / points.get(m).getX()) > 0.0) {
						if (tempans > ans) {
							ans = tempans;
						}
						tempans = 1;
						continue;
					}
					if (points.get(m - 1).getY() != points.get(m).getY()) {					
						tempans++;

						if (tempans > ans) {
							ans = tempans;
						}
					}
				} else {
					tempans = 1;
				}
			}
			log.write(ans + "\n");
		}
		log.flush();
	}

}