Sep 242015

Four glasses are placed on the four corners of a square rotating table. Each glass is either upright (up) or upside-down (down). You have to turn all the glasses in same direction (either all up or all down). There are following conditions

  1. You are blindfolded,
  2. At one time you can only change two glasses (and you cannot touch other two glasses).
  3. The table spins after each time you change the glasses.

When all the glasses comes in one direction, then a bell rings and the game stops?
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Jun 132012

Two friends decided to get together and start riding bikes towards each other, both at a speed of 6 km/hr (starting at the same time). The live 36 km apart and hence will meet halfway.

One of them have a pet pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth between the two friends, at a speed of 18 km/hr until the friends meet.

How much distance (in km) will the pigeon travel? Continue reading »