Problems solved: 21

Area of triangle	2+1	Friendly rooks
Squared fours	Divisibility by 4	One three-digit number
Money date	2020 Palindromes	Random answer
Many digits	VNT	Angle chasing
Not your business	Relatively prime with 2020	2020 digit
Sum of four	Tommorow's day	Test
Temirlan's cake	Numbers ratio	Cubical squares

Games

Under construction