Joachim Wulff (Little Joey) Problem Index
Chinese Shuffle
Send a Table
Planet of the Rock, Paper and Scissors
Playfair Cipher
Prime Suspect
So Doku Checker
Ignoring Digits
Cheapest Base
Tic-Tac-Tough
Get Straight
Mars Buggy
Multisets and Sequences
Chemical Attraction
Very Funny Mr. Feynman
Troubles for Modern Days Problemsetters
Nuts and Bolts
Deal or No Deal
Bit Stream
Potentiometers
Protecting Zonk