May Challenge 2012
Little Elephant and Median, Digits Forest, A Home for Chef, Remember the recipe, Lucky lucky number, Jewels and Stones, Divisible Pairs
August Challenge 2012
Little Elephant and Bombs, Lucky Driving, Range of Data, Delivery Boy
May Challenge 2013
Matchsticks, Field Trip, Your Name is Mine, Name Reduction, Password Cracking Challenge, Witua and Math
August Challenge 2013
Splitting Candies, The Number Of Solutions, Save The Princess, Little Elephant and Lemonade, Hello Hello
September Challenge 2013
Little Elephant and Exams, Merciless Chef, Cool Guys, Chef and Integers , Project Spoon, CAO Stage-1, CAO Stage-2, Sereja and Snake
June Challenge 2014
Chef and Digit Jumps, Chef and Subarray, Guessing Game, Forgot Password
September Challenge 2014
Factorisation, Chef and Rainbow Array - 2, Chef and sequence, Fun with Rotation, Flooring
