How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

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?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

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

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Can you find the company name in the pictogram below?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

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