using System;
using System.Collections.Generic;
using System.Linq;
using System.Globalization;

public class Test
{
   private static readonly int[][] matrix = new int[6][];

    static Test()
        {
            matrix[0] = new int[] { 1, 2, 3, 4, 5, 6 };
            matrix[1] = new int[] { 7, 8, 9, 10, 11, 12 };
            matrix[2] = new int[] { 13, 14, 15, 16, 17, 18 };
            matrix[3] = new int[] { 19, 20, 21, 22, 23, 24 };
            matrix[4] = new int[] { 25, 26, 27, 28, 29, 30 };
            matrix[5] = new int[] { 31, 32, 33, 34, 35, 36 };
        }
        
	public static void Main()
	{
         var hours = Enumerable.Range(00, 24).Select(i => i.ToString("D2"));
         int num = 15;
            var matches = matrix
            .Select((arr, index) => new { arr, xPos = index + 1 })
                                   .Where(x => x.arr.Contains(num))
                                   .Select(x => new
                                   {
                                       X = x.xPos,
                                       Y = (x.arr.Select((n, i) => new { n, i })
                                                 .First(xy => xy.n == num).i) + 1
                                   });
            if (matches.Any())
            {
                var firstMatch = matches.First();
                int x = firstMatch.X;
                int y = firstMatch.Y;
                Console.Write("X:{0} Y:{1}", x,y);
            }
            else 
                Console.Write("Value not found in matrix");
	}
}