How is the moon similar to a dollar?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Can you move 2 matchsticks to form four equal sized squares.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?