January Challenge 2015
Chef and Stones, Sereja and Votes
February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
March Challenge 2015
Chef and Notebooks, Sign Wave
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
August Challenge 2015
Aditi and Magic Trick, Gravity Guy, Cooking Machine, Way Out
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle
April Cook-Off 2015
Equality, Version Control System
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
September Lunchtime 2015
Sum of palindromic numbers
India