Be active and find the killer in the picture Riddle below.

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What does Alexander the Great and Winnie the Pooh have in common?

Find the next number in the series.
1 10 24 43 67 ?

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

Can you find the key in the picture below?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

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.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

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