Keajaiban Matematika

1 x 8 + 1 = 9 12 x 8 + 2 = 98 123 x 8 + 3 = 987 1234 x 8 + 4 = 9876 12345 x 8 + 5 = 987 65 123456 x 8 + 6 = 987654 1234567 x 8 + 7 = 9876543 12345678 x 8 + 8 = 98765432 123456789 x 8 + 9 = 987654321

1 x 9 + 2 = 11
12 x 9 + 3 = 111
123 x 9 + 4 = 1111
1234 x 9 + 5 = 11111
12345 x 9 + 6 = 111111
123456 x 9 + 7 = 1111111
1234567 x 9 + 8 = 11111111
12345678 x 9 + 9 = 111111111
123456789 x 9 +10= 1111111111

9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888

lihatlah komposisi simetri ini :

1 x 1 = 1
11 x 11 = 121
111 x 111 = 12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111 = 12345678987654321

Quote:

123456789 X 9 X 1 = 1111111101 123456789 X 9 X 2 = 2222222202 123456789 X 9 X 3 = 3333333303 dst....

1x9=9
2x9=18 -> 1+8=9
3x9=27 -> 2+7=9
4x9=36 -> 3+6=9
5x9=45 -> 4+5=9
6x9=54 -> 5+4=9
7x9=63 -> 6+3=9
8x9=72 -> 7+2=9
9x9=81 -> 8+1=9

semua angka kalo dikalikan 9, hasilnya kalo dijumlahin sampai tinggal satu angka, hasil akhirnya = 9
contohnya cuma angka 1-9 aja, bisa dicoba lanjutanya..^^