June Challenge 2019 Division 2
Chef and Proxy, Lent Money, Guddu on a Date, Chef and Ingredients, Sum and GCD, Road Signs
January Challenge 2020 Division 2
Equality, (Challenge) Building Anthills, Breaking Bricks, Chefina and Prefix Suffix Sums, Doofish Matrix, Doraemon, Chef and Dynamo
April Challenge 2020 Division 1
Strange Number, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Sell All the Cars, Unit GCD, Factor Tree, Ready Bitwise, Perfect Power Divisors, Squared Subsequences
June Challenge 2020 Division 1
The Tom and Jerry Game!, Covid Sampling (Challenge)
November Challenge 2020 Division 1
Restore Sequence, Ada and Dishes
Philippines