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

2, 3, 5, 9, 17, _ What is the next number in the sequence?

You can see three almost identical images below. Can you spot the odd one out from them?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

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

Replace the question mark in the picture below.

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

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.

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?