Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Next Number in the Series,

5, 16, 49, 104, ?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

What 5-letter word typed in all capital letters can be read the same upside down?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Move three sticks of the spiral below to form a square.

Move four matchsticks to the below square to form three squares?