In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

How far can you walk into the woods?

What has one eye, but can’t see?

What has 13 hearts but no other organs?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

What country can make you shiver?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?