A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

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.

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Who has married many women but was never married?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?