## "Logic Riddles"

#### High tide

A ship in port has a rope ladder that hangs over the side and into the water. The rungs on the ladder are exactly a foot apart from center to center. At low tide, three rungs of the ladder are underwater. How many rungs will be underwater at high tide, which is exactly three feet higher than low tide?

A:
Three rungs. at high tide, the whole boat will also rise.

#### Poisoned Lemons

Two customers at a restaurant order a glass of lemonade. Unbeknown to them, the lemonade is poisoned. The first customer drinks his in one gulp, and experiences a few stomach cramps, but that?s about all. The second customer takes his time drinking the lemonade. He later that day died. Why did the first customer not die?

A:
The poison was in the ice cube. The man who drank his drink quickly did not get affected because the ice cubes did not have time to melt.

#### Lost camel

A peasant has 30 camels. On his way back to the farm, he counts 29. Alarmed, he gets off his camel and counts the camels again. He finds 30. Half an hour later, he counts his camels again and finds 29. Alarmed, he gets off his camel and counts again. He finds 30. Can you explain?

A:
He is not counting the camel when he is on it.

#### Smart moves

A vicious dog was tied to a tree with a five meter rope. Khaled wanted to go back to his car, but the car was only two meters away from the tree. The dog was following Khaled?s every move. How could Jack safely reach his car?

A:
Since the dog was following every move he made, Jack began circling the tree. After several revolutions the rope became shorter, and thus the dog no longer could reach the car.

#### The man in the desert

A man is found in the middle of the desert, dead, with bruises, and what looks like a backpack around his shoulders. There are no footsteps leading to him, or car trails, or animal foot steps. There was no wind for the past week. How did this man get there, and what killed him?

A:
His parachute did not open

#### King and the guard

A night shift guard, while on patrol at night, dreams that the king will die in a plane crash. He tells the king so in the morning, but the king tells him not to worry, and flies anyway. When he returns from his trip, he fires the night shift guard. Why does the king fire the night shift guard?

A:
The night shift guard had a dream. He therefore he was sleeping on the job.

#### A Father and a son

A father and his son are driving down the road when a car hits them. The father dies instantly. The ambulance takes the son to the hospital. When the doctor is asked to operate, the doctor says: “I cannot operate. He is my son! Who is the doctor?

A:
His mother. By the way, 90% of all women get this one wrong.

#### Can’t be buried in the USA

Why can’t Kevin Laroche, who is now living in Canada, not be buried in the USA?

A:
Because he is still alive!

#### 3 Switches

You are standing in front of a room with one lightbulb inside of it. You cannot see if it is on or off. Outside the room there are 3 switches in the off positions. You may turn the switches any way you want to. You stop turning the switches, enter the room and know which switch controls the lightbulb. How?

A:
You turn 2 switches "on" and leave 1 switch "off" and wait about a minute. Then enter the room, but just before you enter, turn one switch from "on" to "off".

Once in the room, feel the lightbulb - if it is warm, but off, it has to be the last switch you turned off. If it is on, it has to be the switch left on. If it is cold and is off, it has to be the switch you left in the off position.

#### Mailing a Valuable Object

Suppose you want to send in the mail a valuable object to a friend. You have a box which is big enough to hold the object. The box has a locking ring which is large enough to have a lock attached and you have several locks with keys. However, your friend does not have the key to any lock that you have. You cannot send the key in an unlocked box since it may be stolen or copied. How do you send the valuable object, locked, to your friend – so it may be opened by your friend?

A:
Send the box with a lock attached and locked. Your friend attaches his or her own lock and sends the box back to you. You remove your lock and send it back to your friend. Your friend may then remove the lock she or he put on and open the box.