Problem Solving - Puzzle 6 The Tricky Triangle

Can you get the triangle pointing downwards by just moving 3 coins? Spend some time trying to figure it out!

Watch the clip below to see how it's done.
Tricky Triangle Puzzle from Magh Éne College on Vimeo.

Problem Solving - Puzzle 7 Sticky Squares

Look at the image on the screen. There are 5 squares. The aim is to move 3 pieces of wood to leave 3 squares remaining. Good Luck!

Problem Solving - Puzzle 1

You have been given 9 weights, one of which is slightly heavier than the rest.

Can you work out which weight is heavier in just two weighings of the balance? 

Please click here to access animation of problem.