---->>>FLIGHT DELAYS!!
Recently, Mathplane has been experiencing slow page loads.
Sorry for the delays. We are working on the traffic and server issues.
Thank you for your patience and persistence!
More challenging combination and permutation problems at vitutor.com (in English and Spanish)
Statistics and counting principle tutorials and problems from analyzemath.com
__________________________________________
Math Comic #120 - "Factorials!" - (1-8-14)
Is this actually a combination lock?
<--- Exercises
<--- Solutions