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.

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

How many letters are in the alphabet?

If eleven plus two equals one, what does nine plus five equal?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Spot what is wrong here in below Picture?

An ant is travelling on a 1-meter-long rope at 1 cm/second but also the entire rope is being stretched by an extra 1 meter/second. Is it possible for the ant to reach at the end of the rope?

Can you quickly find which two matchstick figures are identical?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?