Two Monks on a Mountain

Two monks are standing on the two sides of a 2-dimensional mountain, at altitude 0. The mountain can have any number of ups and downs, but never drops under altitude 0. Prove that the monks can climb or descend the mountain at the same time on both sides, always staying at the same altitude, until they meet at the same point.

Coming soon.


Six Friends Camping

Monday, six friends went camping. Tuesday, John, Jack, and James cooked some mushrooms. Wednesday came and they ate the mushrooms. Thursday found them dead. Exactly one friend survived, how come?

The six friends are called John, Jack, James, Tuesday, Wednesday, and Thursday. John, Jack, James, and Tuesday cooked the mushrooms. Wednesday joined them and they ate the mushrooms. Thursday was the one to find them dead, so he is the survivor.


Pierre the Maze Detective in the Last Giant Maze

Help Pierre catch the evil Mr X before he manages to escape from this giant maze. On your way to him, look out for these hidden items: 

  • 5 hidden stars
  • 5 green treasure chests
  • 5 red trophies
  • Mr. X’s sidekick (wearing a striped blue shirt)
  • 5 elephants
  • 1 lion
  • 1 shark
  • 1 ghost
  • a stolen statue’s head
  • 10 gold weathercocks
Text and illustrations © 2015 IC4DESIGN. 
Excerpt from Pierre the Maze Detective: The Search for the Stolen Maze Stone,
published in 2015 by Laurence King Publishing Ltd., London.

The solution is shown below.