December 2009 (Contest XI)
The N Queens Puzzle Revisited, Effective Sets, Palindromic Numbers, Maze of Digits, Plant Location, Park tour
January 2010 (Contest XII)
Place the balloon, Circle of towers, Cell Phone Towers , Wildcard Matching, Lost Primes, Jawbreaker
February 2010 Contest
Toll Trolls, Sorting device, Soccer League, The Mine Field
March 2010 Contest
Treasure Hunting, Heroes of Magical Might, K-important Strings, The Best Tower, Tri-Hexagonal Puzzle, Traffic jam
April 2010 Contest
Lighting the shop, Adding Fractions, Trip, Flood, The Reversed World, Travelling Salesman Again !
May 2010 Contest
Nice Quadrangles, Rendezvous, Generalized Spanning Trees, Summing Slopes
June 2010 Contest
Robot Game, Squirrel and chestnut, Prime Pattern, Tidying Posters, Pricing Tollbooths, Graph Counting
July 2010
Closest Ranking, Happy Days, Maximal crosses, Rearranging Digits, Adding Least Common Multiples, Block Tower
