The Magic Of Math
1 x 8+1 = 9
12 x 8+2 = 98
123 x 8+3 = 987
1234 x 8+4 = 9876
12345 x 8+5 = 98765
123456 x 8+6 = 987654
1234567 x 8+7 = 9876543
12345678 x 8+8 = 98765432
123456789 x 8+9 = 987654321
12 x 8+2 = 98
123 x 8+3 = 987
1234 x 8+4 = 9876
12345 x 8+5 = 98765
123456 x 8+6 = 987654
1234567 x 8+7 = 9876543
12345678 x 8+8 = 98765432
123456789 x 8+9 = 987654321
Just one of the wonderful things about mathematics.

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November 15th, 2005 at 12:55 pm
cute.
but Natalie, it’s no magic… it works in other bases too
in octal:
1*6 + 1 = 7
12 * 6 + 2 = 76
123 * 6 + 3 = 765
1234 * 6 + 4 = 7654
…
1234567 * 6 + 7 = 7654321
and in hexadecimal
123456789abcdef * e + f = fedcba987654321
see if you can figure out why though