What is black when you buy it, red when you use it, and gray when you throw it away?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

What building has the most stories?

Complete the table series riddle by finding the number that can replace "??".

Find the value of "?" in the ball picture Riddle below:

No one wants to have it, but if one got it, he does not want to lose it. What is It?

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?

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?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.