Problems solved: 20

Area of triangle	NRD pair	Square multiples of 24
Sum of digits 2020	Friendly rooks	2+1
Relatively prime with 2020	Squared fours	One three-digit number
Divisibility by 4	2020 digit	Money date
2020 Palindromes	Random answer	Sum of four
Tommorow's day	Numbers ratio	Temirlan's cake
Test	Cubical squares

Games

Under construction