What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

What is the next number in this series?

4,12,84,3612....

What do you get if you add 2 to 100 four times?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?