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?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

I am quite hot but become too cold if you remove the first two letters. What am I?

What is the next number?

77, 49, 36, 18 ?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Which tank will fill first?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145