Problems solved: 24

NRD pair	Concetric	Sum of digits 2020
One three-digit number	Area of triangle	Bingo!
Relatively prime with 2020	Divisibility by 4	Squared fours
2020 digit	Five Primes	Just Easy Sum
6-sums	Temirlan's cake	Digital Cubes
Lucky numbers	Random answer	Tommorow's day
Sum of four	2020 Palindromes	Money date
Numbers ratio	Cubical squares	Test

Games

Under construction