August 2010 Challenge
Optimizing Production and Sales
August Cook Off
Arranging the Appetizers, Cleaning Up
September 2010 Challenge
Multiples of 3, Brush Fire, Cake Production Line
November 2010 Challenge
Randomly Testing Circuits
December 2010 Challenge
Delivering Bread, A String Game
January 2011 Challenge
Flu Shot Lineup, Count Relations
February 2011 Contest
Bogosort, Coloring Colorable Graphs, Glass Measurement
September Long Contest
Younger Brother, BIT Magazine
April Challenge 2012
Fit to Play, Double Strings, Stacking Pancakes, Greatest Dumpling Fight
February 2013 Challenge
Little Elephant and Cards, Climbing Stairs, Buy1-Get1, Magic Board
October Challenge 2013
Little Elephant and Bamboo, Helping Lira, Maxim and Dividers, Sereja and Transformation
April Challenge 2014
Shortest Path in Binary Trees, Divide the Tangerine, Chef and Digits, Farmer Feb, Counting Matrices
May Challenge 2014
Chef-jumping, Chef and Strange Matrix
June Challenge 2014
Chef and Subarray, Guessing Game, Forgot Password
June Challenge 2016
Chef And The Hiring Event, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
India