Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Which tank will fill first?

who is silent in the parliament?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

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?