From an anonymous leaflet, 1894:
A says B lies; B says C lies; C says A and B lie.
Who lies and who tells the truth?
Puzzles
Tormented
They Grow Up So Fast
The day before yesterday, Timmy was 13 years old. Next year he’ll be 16. What is his birthday, and what is today’s date?
David and Goliath
Up to You
A puzzle by Isaac Asimov:
“Name a common English word that contains somewhere in it, at the beginning, end, or middle, the three letters U-F-A in that order.”
I’ll withhold the answer. There’s no trick — it’s an ordinary English word.
Government Work
Andy is a lazy census taker. He sits in the doorway of his house and counts each pedestrian who walks by.
“That’s no way to do it,” says Bill. He leaves the house and walks up and down the street, counting each person he passes.
After an hour he returns to the house and the two compare totals. Was Bill right? Assume all pedestrians walk at the same speed.
Oh
Why are 1980 pennies worth more than 1979 pennies?
For the same reason that 10 pennies are worth more than 9 pennies.
The Mensa Diet
Finding himself hot and overweight at an Air Force base during World War II, Jerry Salny decided he could shed pounds by drinking scotch and soda. Here’s his reasoning:
- It takes 1 calorie of heat to raise the temperature of 1 gram of water by 1° Celsius.
- A glass holds about 200 cc of scotch, soda, and ice. Its temperature is 0° Celsius.
- As he drinks the scotch and soda, his body must supply enough heat to raise 200 grams to body temperature, or 37°C.
- That’s 200 grams × 37°C, or 7,400 calories.
- “Since all the calorie books show scotch as having 100 calories per ounce, and none at all for the soda, we should be able to drink scotch and soda all day and lose weight like mad.”
“This has been tried,” Salny reported, “and although the experimenter hasn’t lost any weight in the process, he doesn’t worry about it much anymore.”
Why doesn’t it work?
The Pony Puzzle
Sam Loyd claimed to have sold “one thousand million” of these puzzles in the late 1800s, but the solution requires an insight that most solvers overlooked.
“Cut out the six pieces very carefully, then try to arrange them to make the best possible figure of a horse. That is all there is to it, but the entire world laughed for a year over the many grotesque representations of a horse that can be made with those six pieces.”
The Trouble With Waistcoats
Now, sir, your coat is off!
And see–
Your right-hand pocketed!
So let it be:
While o’er your arm
An endless string–
Some three yards round–
Hangs like a sling.
Take the string off–
But, just for fun,
It must be done
Keeping your right-hand in its place,
And not a smile must stir your face.
Until you find this puzzle out,
No coat shall wrap your back about.
How is it to be done?