SNAP Mathfairs
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    • Level 1 Puzzles >
      • Spoke Sum
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      • Circle Jump II
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      • About the Solutions
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    • Level 2 Puzzles >
      • Neighbourhood Sums
      • Eight Squares
      • Soko Puzzle I
      • Soko Puzzle II
      • Abdication
      • Regime Change
      • Stairways to Heaven
      • Catacombs
      • About the Solutions
    • River Crossing Puzzles >
      • The fox, the goose, and the grain
      • The fox, the goose, and the grain, and the dog
      • The mouse, the elephant, the dog, and the cat
      • Soldiers and children
      • Animal Crossing
      • The Three Thieves
      • The Missionaries and the Cannibals
      • Quarrelsome Boys
      • Jealous husbands
      • A Handful for the Farmer
      • The farmer, his children, and their pets
      • About the Solutions
    • Sudoku-Type Puzzles >
      • Cats, Cows, and Pigs
      • Latin Squares
      • Apple and Bananas I
      • Apple and Bananas II
      • Apple, Bananas, and Cherries
      • Four Skyscraper Puzzles
      • Colourful Cats and Pigs I
      • Colourful Cats and Pigs II
      • The Wizard's Hats
      • Four Colours
      • About the Solutions
    • Other Puzzles >
      • Catch the Thief
      • Cherry Glasses
      • Coin Jumping I
      • Coin Jumping II
      • Evensies
      • The 22 Game
      • Switch Positions
      • Spellbound Frogs
      • The Die Hard Jugs
      • About the Solutions
    • About the Solutions
  • About SNAP
    • Our Mandate
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    • Who Are We?
    • Curriculum Connections
    • The SNAP Approach and "Inquiry-Based Learning"
    • Some History
  • Gallery

Spellbound Frogs

Picture
Eight frogs sit on lily pads in a square pond.

A nasty wizard has cast a spell of timidity over the frogs. The spell works like this: as soon as something jumps over a frog, it will dive into the water and stay at the bottom of the pond until the spell is broken.

To break the spell, one of the frogs must hop onto one of the yellow magic lily pads. As soon as one frog lands on a magic lily pad, all frogs are freed from the spell. It's your task to figure out how the frogs can do this when they start from the positions shown in the picture.

However, there's a complication: frogs are only allowed to jump over another frog next to it and land on the next lily pad, and the frogs can only jump horizontally and vertically, not diagonally. A frog cannot jump over an empty lily pad, and two frogs cannot share the same lily pad.

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