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’m tall when I’m young, and I’m short when I’m old. What am I?

I can write cow in 13 letters.

Can You?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What do you see in the given picture?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?