Piece of Cake #03

Problems

Name Solved / Tries Average tries Average tries to solve
A Östgötska 1/1 (100%) 1.00 1.00
B Odd Gnome 1/1 (100%) 1.00 1.00
C Musical Scales 1/1 (100%) 1.00 1.00
D Mirror Images 1/1 (100%) 1.00 1.00
E Luhn's Checksum Algorithm 0/0 (0%) -- --
F Line Them Up 0/0 (0%) -- --