Problems solved: 45

Relatively prime with 2020	Negative roots	6-sums
Just Easy Sum	Lucky numbers	Minimizing Fibb
Oh-matrix	Bingo!	Small triangular numbers
Friendly rooks	Sum of digits 2020	Just sequence
Area of triangle	Equilateral Triangles	Square multiples of 24
2020 Palindromes	Sum of four	Fractions
Triangle in Hexagon	Five Primes	Quadratic
Triangle and Square	Novirus	Bools and cows
5 instead of 1	C Sum	Sum probability
Many digits	Sequenta	Polynomial without 4
x[x]	Not your business	2+1
2020 digit	Random answer	Test
Infinite game	Function	U turn
Tommorow's day	Cubical squares	Money date
Temirlan's cake	One three-digit number	Numbers ratio

Games

Under construction