Riddle: Word Problems

Submitted by: R. Esses

In the addition problem below, each unique letter represents a different digit from 0 to 9. Identical letters represent identical digits. For the sum to be correct, what number must EIGHT represent? And if W is greater than N but less than V, what must be the values on ONE, TWO and FIVE?

  ONE

  TWO

+FIVE

EIGHT

Last Month’s Riddle: Which Is The Right Switch?

Four switches can be turned on or off. One is the light switch for the incandescent overhead light in the next room, which is initially off, but you don’t know which. The other three switches do nothing. From the room with the switches in it, you can’t see whether the light in the next room is turned on or off. You may flip the switches as often and as many times as you like, but once you enter the next room to check on the light, you must be able to say which switch controls the light without flipping the switches any further. (And you can’t open the door without entering, either!) How can you determine which switch controls the light?

Solution

Turn on switches 3 and 4 and wait fifteen minutes or so. Then turn switch 3 off, turn switch 2 on, and enter the room. If the bulb is dark and cool, switch 1 controls it. If the bulb is bright and cool, switch 2 controls it. If the bulb is dark and warm, switch 3 controls it. If the bulb is bright and warm, switch 4 controls it.

Solved by: Jack Gabbay, Howard Jay Meyer, Victor Grazi, Dr. Moussa Faour

Junior Riddle: World Traveler

Submitted by Yitzchak Shalam

What can travel around the world while staying in a corner?

Last Month’s Junior Riddle: Two Words

My answer is only two words.

To keep me, you must give me.

Solution: Your word

Solved by: Daniel Husney, Chani A, Dawn Green