105 - The Skyline Problem

2002-12-03

591 - Box of Bricks

2001-12-11

10035 - Primary Arithmetic

2002-04-16

10038 - Jolly Jumpers

2002-12-25

10370 - Above Average

2002-03-27

11875 - Brick Game

2011-06-21

11942 - Lumberjack Sequencing

2011-06-06