Alternating Empties

Six glasses are all in a row in front of you, the first three are full of grape juice and the last three are empty. Moving only one glass, how can you make all six alternate between full and empty?

Pour the contents of the second glass into the fifth glass.

Posted in Brain Teasers

Sum of Consecutives

What is the sum of the numbers in the following list which are consecutive?

15  5 10 28
24  7 18 26
11 21 17 13
22  9  1 20

The consecutive numbers are: 9, 10, 11; 17, 18; and 20, 21, 22.

The sum of those numbers is 128.

Posted in Brain Teasers

Twenty One Points Divide And Dance

Twenty one points divide and dance,
Twirling and leaping about,
Ladies, Romans and knights of France,
Craving a victor’s rout,
Wrought of wood, ivory or bone,
An exciting yet vicious pursuit,
Ancient, forbidden and crooked,
All in search of the loot.

A die. The standard die has 21 pips (or points), divided up on the six sides of the die which dance around when rolled. Ladies, knights and Romans all played dice as a pastime (though not together). Dice can be made of wood, ivory and bone, among other materials. Dice have been used in Asia since before recorded history and many governments tried unsuccessfully to outlaw the game. Professional gamblers were common and often used loaded dice. Desperate German chaps even bet their own liberty on a single roll of the dice.

Posted in Riddles

Wear Black

What does this represent?

Wear
Black

Black underwear.

Posted in Riddles

When Set Loose I Fly Away

When set loose
I fly away,
Never so cursed
As when I go astray.

A fart.

Posted in Riddles

Copying Cassette Tapes

Joe and Andrea want to copy three 60-minute cassette tapes. They have a 2-cassette recorder to copy the tapes, allowing them to copy two tapes at a time. Each side takes 30 minutes to be copied, so two tapes can be copied in an hour and the third will take another hour. Andrea bets Joe she can copy all three tapes in 90 minutes. Does she win the bet?

In the first 30 minutes Andrea copies the A sides of tape 1 and 2.
In the second 30 minutes, she copies tape 1 side B and tape 3 side A (finishing Tape 1).
In the last 30 minutes, she copies tape 2 side B and tape 3 side B.

Posted in Brain Teasers

All Things Devours

This thing all things devours,
Birds, beasts, trees, and flowers.
Gnaws iron bites steel,
Grinds hard stones to meal,
Slays king, ruins town,
And beats high mountain down

Time. Iron, steel, stone and virtually any substance will be worn down given enough time.

(From J.R.R. Tolkien’s The Hobbit)

Posted in Riddles

Garlic or Spice

Before any changes I’m a garlic or spice. My first is altered and I’m a hand-warming device. My second is changed and I’m trees in full bloom. The next letter change makes a deathly old tomb. Change the fourth to make a fruit of the vine. Change the last for a chart plotted with lines. What was I? What did I become? What did I turn out to be?

clove
glove
grove
grave
grape
graph

Posted in Riddles

Kaitlyn’s Age Plus and Minus Three

Kaitlyn’s age plus three has an integer square root. Three years ago, Kaitlyn’s age was the square root.

How old is Kaitlyn?

Kaitlyn is 6 years old.

6 + 3 = 9, and 9 has an integer square root.

6 – 3 = 3, and 3 is the square root of 9.

Posted in Brain Teasers

Horses, Sleep and Dreams

What do horses, sleep and dreams have in common?

Nightmares.

Posted in Riddles