There are forty elephants and they have forty-fore heads. How can this be possible?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

What's a single-digit number with no value?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

Count the number of balls in picture below: