If you look, you can’t see me. If you see me, you cannot see anything else. I can make you walk if you can’t. Sometimes I speak the truth. And sometimes I lie. What am I?

A man is asked what his daughters look like. He answers, “They are all blondes, but two, all brunettes, but two, and all redheads, but two.” How many daughters did he have?

There are two plastic jugs filled with water. How could you put all of this water into a barrel, without using the jugs or any dividers, and still tell which water came from which jug?

A man orders a coffee and finds a fly in it. He sends it back and gets another one. But he quickly discovers that they gave him the same coffee that had the fly in it. How did he know?

You must cut a birthday cake into eight equal pieces, but you’re only allowed to make three straight cuts, and you can’t move pieces of the cake as you cut. How can you do it?

There are a few trees in a garden. On one of them, a pear tree, there are pears. But after a strong wind blew, there were neither pears on the tree nor on the ground. How is this possible?

The Pope has it but he does not use it. Your father has it but your mother uses it. Nuns do not need it. Arnold Schwarzenegger has a big one, Michael J. Fox’s is quite small. What is it?

Chris and Leon are twin brothers. Chris is elder to Leon by 2 minutes. One day, Chris celebrated his birthday. Two days later, his twin brother, Leon, celebrated his birthday. How is this possible?

A nonstop train leaves Moscow for Leningrad at 60 miles per hour. Another nonstop train leaves Leningrad for Moscow at 40 miles an hour. How far apart are the trains 1 hour before they pass each other?

At six o’clock the wall clock struck 6 times. Checking with my watch, I noticed that the time between the first and last strokes was 30 seconds. How long will the clock take to strike 12 at midnight?

I went to bed at eight o’clock in the evening and wound up my clock and set the alarm to sound at nine o’clock in the morning. How many hours sleep would I get before being awoken by the alarm?

There are two planes. One is flying from New York to Tokyo at a speed of 800 MPH. The other is flying from Tokyo to New York at a speed of 700 MPH. When the planes meet, which one will be closer to Tokyo?

Thirteen per cent of the people in a certain town have unlisted phone numbers. You select three hundred names at random from the phone book. What is the expected number of people who will have unlisted numbers?

A window cleaner is cleaning the windows on the 25th floor of a skyscraper when, suddenly, he slips and falls. He has no safety equipment and nothing to soften his fall, and yet he is not hurt. How can this be?

Tom was running late for work. He quickly got dressed and threw a t-shirt on in the dark. He had it on inside out with his right arm in the left sleeve, and his left arm in the right sleeve. Where was the label?