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One hundred green-eyed logicians have been imprisoned on an island by a mad dictator. Their only hope for freedom lies in the answer to one famously difficult logic puzzle. Can you solve it? Alex Gendler walks us through this green-eyed riddle. View full lesson here: https://ed.ted.com/lessons/the-famously-difficult-green-eyed-logic-puzzle-alex-gendler Subtítulos en español. Duración 4:30.

Euclid, known as the "Father of Geometry," developed several of modern geometry's most enduring theorems. But what can we make of his mysterious fifth postulate, the parallel postulate? Jeff Dekofsky shows us how mathematical minds have put the postulate to the test and led to larger questions of how we understand mathematical principles. View full lesson: https://ed.ted.com/lessons/euclid-s-puzzling-parallel-postulate-jeff-dekofsky Subtítulos en español. Duración 3:25.

You'd have a hard time finding the medieval city Königsberg on any modern maps, but one particular quirk in its geography has made it one of the most famous cities in mathematics. Dan Van der Vieren explains how grappling with Königsberg's puzzling seven bridges led famous mathematician Leonhard Euler to invent a new field of mathematics. View full lesson: http://ed.ted.com/lessons/how-the-konigsberg-bridge-problem-changed-mathematics-dan-van-der-vieren English subtitles.

Pasen y Vean la magia matemática interactiva: telepatía, tangrams, animaciones, puzzles, ilusiones ópticas, paradojas geométricas, teselaciones dinámicas, astucias para comprender las matemáticas, anécdotas históricas y... muchas cosas más en mi desván de travesuras matemáticas donde todo se mueve...

Dutch artist Piet Mondrian's abstract, rectangular paintings inspired mathematicians to create a two-fold challenge. Can you solve the puzzle and get to the lowest score possible? Gordon Hamilton shows how. View full lesson here: https://ed.ted.com/lessons/can-you-solve-the-mondrian-squares-riddle-gord-hamilton English subtitles. Duración 5:10.

After a massive storm tears through the Hex Archipelago, you find five grizzled survivors in the water. As an act of gratitude for saving them, they reveal a secret - the island they were just on holds some buried treasure. But when the sailors try to describe the island, something seems off. Can you find the booty despite their strange instructions? Daniel Griller shows how. View full lesson here: https://ed.ted.com/lessons/can-you-solve-the-buried-treasure-riddle-daniel-griller This riddle is an adaptation of "Helen on the island" and appears in its original form in the book Elastic Numbers: 108 Puzzles for the Serious Problem Solver by the educator. Subtítulos en español. Duración 3:54.

You heard the travelers' tales, you followed the maps, and now, you've finally located the dungeon containing a stash of ancient coins. The good news: the wizard who owns the castle has generously agreed to let you have the coins. The bad news: he's not quite as generous about letting you leave the dungeon ... unless you solve his puzzle. Can you solve it and get out alive? Lisa Winer shows how. Solution to the bonus riddle mentioned at the end: https://brilliant.org/tededcoinflip Subtítulos en español. Duración 4:40.

1, 11, 21, 1211, 111221. These are the first five elements of a number sequence. Can you figure out what comes next? Alex Gendler reveals the answer and explains how beyond just being a neat puzzle, this type of sequence has practical applications as well. View full lesson: https://ed.ted.com/lessons/can-you-find-the-next-number-in-this-sequence-alex-gendler Subtítulos en español. Duración 3:42.

Imagine a game of dice: if the biggest number rolled is one, two, three, or four, player 1 wins. If the biggest number rolled is five or six, player 2 wins. Who has the best probability of winning the game? Leonardo Barichello explains how probability holds the answer to this seemingly counterintuitive puzzle. View full lesson: https://ed.ted.com/lessons/the-last-banana-a-thought-experiment-in-probability-leonardo-barichello Subtítulos en español. Duración 3:57.

You and your team have crash-landed on an ancient planet. Can you appease the three alien overlords who rule it and get your team safely home? Created by logician Raymond Smullyan, and popularized by his colleague George Boolos, this riddle has been called the hardest logic puzzle ever. Alex Gendler shows how to solve it. View full lesson here: https://ed.ted.com/lessons/can-you-solve-the-three-gods-riddle-alex-gendler Subtítulos en español. Duración 4:40.

Hay aplicación para móvil: https://play.google.com/store/apps/details?id=net.bonusstage.mensekimeiro

Puzzles tipo cruz del diablo en flash.

Mobiles, Who Am I?, MysteryGrid. Transition to Algebra. Explore, deduce, create.