Cifras & Letras is an entertaining game that challenges your mental agility with two tests. The first one is a numbers test where you are given six numbers and must use basic operations (addition, subtraction, multiplication, and division) to get the exact result. The second one is a letters test where you must find the longest possible word with nine random letters. All words accepted by the RAE, including verb gerunds and participles, are allowed.

You can play quick rounds of numbers or letters, where you have 60 seconds to reach the goal, or you can play a classic game of ten rounds, where you accumulate points to try to beat your record in the game's ranking.