January Challenge 2020 Division 2
Equality, Breaking Bricks, Chef and Dynamo
February Challenge 2020 Division 2
No Change Required, The Theatre Problem, School of Geometry, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps
April Challenge 2020 Division 2
Unit GCD, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Sell All the Cars, Squared Subsequences, Strange Number
January Cook-Off 2020 Division 2
Chef Chick, Exam Cheating
July Challenge 2020 Division 2
Chef and Card Game, Chef and Strings
December Challenge 2020 Division 2
Even Pair Sum, Vaccine Production, Vaccine Distribution
India