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?

I have Rs.50 and I spend it in the way as below.

How can you make number one disappear by adding something to it?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

What month of the year has 28 days?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

What Adam and Eve do not have but the rest of the people have?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?