There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Our product and our sum always give the same answer. Who are we?

How many words can a pen with half refill write?

The answer I give is yes, but what I mean is no. What was the question?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?