An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I can write cow in 13 letters.

Can You?

Where do fish keep their money?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Count the number of triangles in the given picture.

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?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Suppose you are a girl candidate and sitting in an interview. Suddenly the interviewer asks you, 'What if one morning you wake up and find out that you are pregnant?

How will you reply to such a question?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?