Showing what's behind the curtain

Prime Subset Sums

Find the number of non-empty subsets of {1^{1}, 2^{2}, 3^{3},…, 250250^{250250}}, the sum of whose elements is divisible by 250.

Euclid’s simple formula to generate Pythagorean triples.

Solve Krypto math problems

Determining the value of infinite polynomial series for which the coefficients are Fibonacci numbers.

Investigating isosceles triangle for which the height and base length differ by one.

Finding the maximum remainder when (a − 1)^{n} + (a + 1)^{n} is divided by a^{2}.

Find the number of consecutive integers pairs that have the same number of positive divisors.

Getting the ‘id’ index from the last INSERT in MySQL

Because of some frustration and claims of unsolvable levels we took screen shots of solutions for every level. We understand that sometimes it nice just to know what to expect from some of these tricky levels.