How many sides does a circle have?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

What can you see in the middle of March and April that you can never see in any other month?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Using eight eights and addition only, can you make 1000?