What is the Surname of Barbie Doll?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

Which English verb becomes past tense just by rearranging the letters?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

A Detective reviewed the information they had on the case so far.

A lady named 'Caterina' was found shot and they already had a list of suspects - Ankit, Tarun, Harish, Manoj and Manish.
The killer is a fan of challenges him by leaving notes ad various places.
* The first was found in a toilet room.
* The second was found in an art room.
* The third was in a restroom.
* the fourth in an underwater room.
* The fifth at the no-smoking room.

All of the notes read the same thing, 'The clues are where you find the notes.' Yet, nothing was found at any place the notes were.
Detective the genius, immediately solved the case.
Who was the killer?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Using Only Five 5's and any mathematical operator make sum as 37

What type of tree can I carry in my hand?