It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

What's the only room from which no one can enter or leave

Replace the question mark with the number below given a simple math problem.

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?

I have feet, but no legs. Which animal Am I?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A sundial has the fewest moving parts of any timepiece. Which has the most?

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

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?