January 2011 Challenge
Count Relations, Splitting Giant Subs
February 2011 Contest
Coloring Colorable Graphs
March 2011 Challenge
The Amazing All-In-One Cooking Machine - Challenge
April Long Contest
Gravel, Number Game Revisited
March 2012 Challenge
Free Shuttle Service, Spoon in Matrix, Home Delivery
June Challenge 2012
Little Elephant and Candies, Arranging Cup-cakes
July Cook-Off 2012
Ciel and Receipt, Ciel and Tomya
September Challenge 2012
Three is Crowd, ChefTown Parade, Racing Horses, Kisses & Hugs, Queries About Numbers
November Challenge 2012
Coin Flip, Sridhar Likes Travelling
November Cook-Off 2012
Little Elephant and Permutations, Little Elephant and Divisors
January Challenge 2013
Three Different Numbers, Chef of the Year, End Of The World, The Minimum Number Of Moves, Little Elephant and Alcohol
February 2013 Challenge
Buy1-Get1, Climbing Stairs
August Challenge 2013
Little Elephant and Lemonade, Hello Hello, Save The Princess, The Number Of Solutions, Chef and Segments, Deleting numbers, Splitting Candies
October Cook-Off 2013
Polo the Penguin and the Numbers, Polo the Penguin and the Test
