If a wheel has 54 spokes, how many spaces are there between the spokes?

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Can you fill the blank with the correct number?

6 30 870 756030 _____

81 x 9 = 801. What must you do to make the this equation true?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

I am an odd number. Take away a letter and I become even. What number am I?