When is one silver bar preferable over one gold bar?

If a solid piece of iron shaped as a doughnut was placed under extreme heat, what would the hole in the middle do?

The following task involves several steps, but they are out of order. Arrange them so that a person who follows the steps exactly can perform the task:

You have three heavy beams marked A, B, and C, and want to find out which one is the heaviest. You also have a scale that tells you which of any two beams is heavier, but it does not give the specific weight of any beam. In what order must you perform the following steps to determine which beam is the heaviest, and to mark it accordingly? Assume that all three have different weights.

a) Weigh A against B.
b) Weigh B against C.
c) Weigh A against C.
d) If A is heavier, skip the next three statements.
e) If A is...

Five men and five dogs (each man owned a dog) went hiking. They encountered a river that was swift and deep. The only way to cross it was an abandoned boat, left ashore on their side. But it would only hold three living things. Unfortunately, the dogs were edgy and could not be near another person (not even momentarily) unless its owner was present. One of the dogs attended a highly advanced, highly specialized obedience school and therefore knew how to operate the boat (as the men did) -- the other dogs lack this skill. How did the five men and the five dogs cross the river?

In the Yosef family there are 11 children. 7 of them are girls named: Ilana, Tikva, Efrat, Ziva, Lilly, Zahava & Ronit. The rest are boys named: Ofer, Rami, Zalman & Ronny. You have to find out in which order they were born, according to the next 12 statments:

1) The eldest and the youngest are girls.
2) The second youngest starts with an R.
3) The first starts with a Z.
4) Ronny & Ronit were born one after the other, in that order.
5) Ronit is not the youngest, not the 2nd youngest.
6) The youngest child starts with a vowel.
7) The 4th has an M in his/her name.
8) Zalman & Lilly were born one after the other in that order.
9) The 7th ends ...

You're walking down a street, when you see some people gambling on the roadside.

The dealer says:

"There are 10 black balls and 10 white balls in this jar. You are blindfolded and you randomly pick 10 balls. If 5 of the balls you picked are black and the other 5 are white, you lose $2. Otherwise you win $1."

Is the gamble fair?

Jelly Belly beans were the first jelly beans in outer space when President Reagan sent them on the 1983 flight of the space shuttle Challenger.

Three astronauts had four jelly beans left among them one night - a black, a yellow, a green and a red. No astronaut ate more than one jelly bean and the red bean was definitely eaten. According to the following statements, determine which astronaut ate which jelly bean.

1. If the second astronaut did not eat the yellow or green jelly bean, then the first astronaut ate the red bean.

2. The second astronaut ate the yellow jelly bean, unless the first astronaut ate the red jelly bean.

3. If the third astronaut did not eat the black or yellow ...

By changing the third letter of each of the words below, can you make another valid word. You have to change each word such that the third letters will reveal a ten letter word when read downwards. Therefore, what now reads KRZSAPROKD will be a real word. What ten letter word is formed?

BAKE
CURE
MAZE
PEST
NEAT
ROPE
PORT
FOOD
POKE
SODA

A man has 3 cards face down on a table. One is a jack and two are aces. He knows the order but you do not. You can ask him one yes or no question, but when you do you have to point to one of the cards. If you point to an ace, he will tell the truth, if you point to the jack, he will randomly say yes or no. You have to find one of the aces.

After you have dealt about half of the 52 cards for a bridge game (with four players), the phone rings. You put down the undealt cards to answer the phone. When you return, none of the cards has been touched, and no one can remember where the last card was dealt. Without counting the cards in any hand, or the number of cards yet to be dealt, how can you finish dealing rapidly and accurately, giving each player exactly the same cards they would have received if you hadn't been interrupted?

A man and a boy who are walking together step out with their right feet. The boy walks three paces while the man walks two. When will they both put their left feet forward together?

Googlebunnies are creatures that come in two types (spooky and flitty) and two genders (male and female). The spooky males and flitty females always tell the truth; flitty males and spooky females always lie.

You come across 3 Googlebunnies. Determine the type and gender of each based on their statements:

A: Ask B what my type is - he will give a truthful answer. C is flitty.

B: A and I are both males. C is a female.

C: A and B are both females. B is spooky.

Which country or nation has a value of 5?

There are 12 gold coins. One of the coins is fake. It is known that a fake coin weighs either slightly less or slightly more than a real coin. Using a balance scale, how can you find the fake coin, and determine if it weighs less or more than a real coin, in only three weighings?

Five young ladies (Liz, Marge, Sam, Ella and Jenny) went on five different hiking adventures. Each walked a distance of 3, 4, 5, 6, and 7 kilometers (random order). Each were able to take an extraordinary wildlife photograph in different locations (forest, meadow, mountain, river side and bushes) of different animals (rabbit, bird, deer, fox and bear cubs). From the clues below determine where and of what each girl took a photograph of, and the distance each travelled.

1. Liz walked twice as far as the girl who saw the deer. The girl who got a shot of the fox travelled one kilometer less than Jenny. The girl in the bushes was not the one who walked 5 kilometers. The girl on the riverside...

Each of the clues below is for a word that begins with "tri". The clues do not refer to the words themselves, but rather to the word that must be added to "tri". eg. "A description of three goods to encourage sales" would be "triad".

1. Where you would find three peas
2. Passing through three intermediate places on the way to your destination
3. To fish with three hooks and bait
4. To hurl three things at once
5. A small container for three liquids

The following not only describes a book, but it's an anagram for the title. What is it?

Huge water tale stuns. End had you tense.

A particular inn always offers the same nine dishes on its dinner menu: A, B, C, D, E, F, G, H and I. Five foreigners arrive. Nobody tells them which dish corresponds to each letter and so they each select one letter without knowing what they will eat. The innkeeper arrives with the five dishes ordered and puts them in the center of the table so that they can decide who eats what. This goes on for two more nights. The foreigners, who are professors of logic, were able to deduce by the dishes they ordered which letter represents what dish. What could have been the dishes ordered each of the three nights? Note: Each dish was ordered at least once.

The following chart is missing its title. What is it a chart of?

African Elephant - 640
Rhinoceros - 560
Giraffe - 450
Cow - 280
Orangutan - 275
Human Being - 267
Reindeer - 246
Panther - 93
Kangaroo - 40
Rabbit - 31
Hamster - 16
Opossum - 13

Someone offers you the following deal:

There is a deck of 100 initially blank cards. The dealer is allowed to write ANY positive integer, one per card, leaving none blank. You are then asked to turn over as many cards as you wish. If the last card you turn over is the highest in the deck, you win; otherwise, you lose.

Winning grants you $50, and losing costs you only the $10 you paid to play.

Would you accept this challenge?

You have four lengths of gold chain. One is made up of five links, two are made of four links, and one made of three links. These need to be made into one bracelet. The jeweler you have taken them to charges 50 cents to break a link and $1.00 to weld a link back together. You figure it would cost $6.00, but the jeweler finds a cheaper way. What is it and how much will it cost?