Challenge Level

Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

Challenge Level

How many moves does it take to swap over some red and blue frogs? Do you have a method?

Challenge Level

Solve the equations to identify the clue numbers in this Sudoku problem.

Challenge Level

Can you find the percentage increase if the results appear in code?

Challenge Level

Five equations and five unknowns. Is there an easy way to find the unknown values?

Challenge Level

Find all the triples of numbers a, b, c such that each one of them plus the product of the other two is always 2.