Problems solved: 40

Temirlan's cake	2+1	Sequenta
Expanding brackets	Special square	Product of differences
Similar polynomials	Positive product of sums	Lin's Numbers
Prime powers	Solutions on the interval	C Sum
Square multiples of 24	Numbers ratio	335577
5 instead of 1	Viet said	Not fibbo
Many digits	Irreducible Fractions	Small triangular numbers
x[x]	Function	2020 digit
Five Primes	Digital Cubes	Money date
Sum of four	Test	Divisibility by 4
Odd divisors	Squared fours	One three-digit number
Just sequence	Almost squared numbers	Lucky numbers
Cubical squares	2020 Palindromes	Relatively prime with 2020

Games

Under construction