You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What does this mean?

CCCCCCC

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

Solve the mathematical equation in the picture below.

What number comes next in the series?

5 15 5 18 5 24 14 20 _

I’m tall when I’m young, and I’m short when I’m old. What am I?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?