When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

How many bananas can you eat if your stomach is empty?

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 out a way through which you can make five squares out of the given figure by moving just six match sticks?

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

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?