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?

I was given 100 questions to be solved. I scored 85. The score was calculated by subtracting twice the number of wrong answers from number of correct answers. How many questions did I solve correctly?

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?

Fred can eat 27 chocolates in a hour, Alice can eat 2 chocolates in 10 minutes, and Kelly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a large box of 120 chocolates?

To weigh a 40-pound object with four weights – 1, 3, 9, and 27 pounds, the merchant placed all of the weights on one side of the scale and the object on the other side. But how did he weigh 5 pounds?

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?

A man drove all the way from New York to San Francisco only to discover at the end of the trip that he had a flat tyre from the very start. Yet his car was completely unaffected by it? How is this possible?

A grandfather and his grandson have the same birthday date. For six consecutive birthdays the grandfather was a multiple of the grandson’s age. How old were each at their sixth consecutive birthday?

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?

Mr. Mark went to the market with his dog. He rode on a horse to the market, Yet walked. The horse’s name was Victory and the dog was from South Africa. What is the name of the dog that went to the market?

There are 9 balls that are identical. Only one ball is heavier than the rest. You also have a two-armed scale with which to measure the weight of the balls. Find the heavier ball by using the scale only twice.

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?