Start with a knack for anagrams. Multiply that by a way with numbers. Subtract from the result any morning or late-night fuzzyheadedness. You now know your HGQ, or Head Games Quotient.

Palindromes, shared snacks, travel at uniform velocitysuch are the ingredients of conundrums that will give you a mental workout to keep your brain humming away all day long.

Did you cut your teeth on crossword puzzles? Do you sprint blithely through a set of sudoku puzzles? Can you rearrange the letters in eleven plus two to produce a different, but equal, addition problem? Step up to Head Games.