• Each puzzle has only one solution.

• Hidato puzzles can be solved with pure logic. No guesswork is needed.

• It’s not necessary to start with the first number – sometimes it’s better to start somewhere else.

• Working backwards (counting down) can reveal key clues to solving the puzzle.

Four friends need to cross a bridge. They start on the same side of the bridge. A maximum of two people can cross at any time. It is night and they have just one lamp. People that cross the bridge must carry the lamp to see the way. A pair must walk together at the speed of the slower person: Rachel: - takes 1 minute to cross; Ben: - takes 2 minutes to cross; George: - takes 7 minutes to cross; Yvonne: - takes 10 minutes to cross. The second fastest way of getting the friends across takes 21 minutes. The fastest takes 17 minutes. Can you work out how it is done?

• A puzzle that uses cards which have 4 features

  • COLORS (red, green, purple)

  • SYMBOLS (squiggles, diamonds, ovals)

  • SHADINGS (solid, striped, outlined)

  • NUMBER of symbols (one, two, three)

• There is only rule to make a set. A set of 3 cards in which each individual feature is either all the same on each card or all different on each card.

• https://www.youtube.com/watch?v=azaArSs-i0c