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

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Find the Odd One Out?
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The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

When we see 2 but call 10?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

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?