Rahasia di Balik Angka 9

2 x 9 = 18, 1 + 8 = 9 3 x 9 = 27, 2 + 7 = 9 4 x 9 = 36, 3 + 6 = 9 5 x 9 = 45, 4 + 5 = 9 6 x 9 = 54, 5 + 4 = 9 7 x 9 = 63, 6 + 3 = 9 8 x 9 = 72, 7 + 2 = 9 9 x 9 = 81, 8 + 1 = 9 9 x10= 90, 9 + 0 = 9