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

O T T F F S S ?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

What always comes into a house through the keyhole?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

What goes through cities and fields, but never moves?

The centre of the third figure is empty. What digit should fit inside?

Identify the 10 differences between the two given pictures.