A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Why do Chinese men eat more rice than Japanese men do ?

Spot 5 differences in two Christmas tree below:

Look at the picture and find out which square is not linked with any of the other squares.

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?