May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Missing a Point, Chef and Strings, Chef and Card Game, Doctor Chef, Chefina and Swaps, Ada King
August Challenge 2020 Division 2
Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess
September Challenge 2020 Division 2
Coronavirus Spread 2, A Problem on Sticks, Chefina and Swap, Ada Matrix
October Challenge 2020 Division 2
Positive AND, Covid Run, Chef and Easy Queries
December Challenge 2020 Division 2
Vaccine Distribution, Vaccine Production, Even Pair Sum, Positive Prefixes
February Challenge 2021 Division 3
Maximise Function, Highest Divisor
February Lunchtime 2021 Division 3
Daanish and Problems, Smallest Possible Whole Number
March Challenge 2021 Division 3
Interesting XOR!, Chef and Groups, Space Arrays, No Time to Wait
India