Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

What has one eye, but can’t see?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

Take one out and scratch my head, I am now black but once was red. What am I?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

What is more useful when it is broken?

What is the riddle which can be asked all day with a different correct answer each time.

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

What country can make you shiver?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?