In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Solve the equation in the image by looking at the pattern closely.

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

O T T F F S S ?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What does it mean?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?