Solve this alphametic, where ten and nine are respectively numbers in base 10 and base 9 notation. Each of the small letters in bold represents a different digit, and none of the numbers contains any leading zero.

(ten)₁₀ - (nine)₉ = 1

901-1210=1

1210 base 9 in base 10 is 900

Posted by Daniel on 2009-04-23 11:48:49