A workshop in Florida for 2009 Math Kangaroo Competition.
Visit Math Kangaroo webpage for registration and information about the competition: www.mathkangaroo.org
The odometer of my car indicates 187569. All the digits of this number are different. After how many more kilometres will this happen again?
A. 1 B. 21 C. 431 D. 12431 E. 13776
it's b because 187569 + 21 =187590