The numbers t, u, v, w, and x are five consecutive even integers in increasing order. What is the average (arithmetic mean) of these five numbers?

1. The average (arithmetic mean) of u and v is 121.
2. $u+w=244$

Are all of the numbers in a certain list of 20 numbers equal?

1. The sum of all the numbers in the list is 100.
2. The sum of any 5 numbers in the list is 25.

If Set R = {223, 225, 227, 229, 231, 233, 235, 237}, and Set S is formed such that it contains exactly 6 distinct numbers that are members of Set R, what is the standard deviation of the numbers in Set S?

1. The average (arithmetic mean) of the numbers that are members of Set S is equal to the average of the numbers that are members of Set R.
2. Set S does not contain 223.

Eugene Fama's theory of there being "efficient" financial markets, meaning that an investor, given widely available information, cannot consistently achieve returns in excess of average market returns, is still respected.

Investors question whether there will be an end to the recent pattern in which a social network attains an unprecedented number of customers, which is dethroned by a new company with a slightly different product concept.

According to the nineteenth-century schema of a "well-made play," all of the happenings on stage are driven by a single discovery, such as that of a letter, and when they follow from it in a series of events, often involving misinterpretations by the characters.

Arguably, Charles Dickens' current popular fame is not owed to A Tale of Two Cities, or Great Expectations, but A Christmas Carol, thanks to the many TV and movie adaptations of that story.

Tax evasion and fraud are wealth distortion mechanisms that enable the owners and controllers of wealth to escape their responsibilities to society and to be able to continue to accumulate wealth with the support of that same society.

The average height of Americans and Europeans decreased during the rapid industrialization of the 19th century, a decline that is explained not so much because of a population increase as by the fact that economic inequality became more acute, leading to widely disparate levels of nutrition.

Behavioral psychology studies have yielded evidence that indicates that people tend to seek out evidence that will confirm their hypotheses, and failing to ask disconfirming questions.

In the 1990s, Australian vineyards, innovators in marketing and in product development, stormed the market with wines both accessible to the palate and psychology of young wine drinkers, and they did so without sacrificing the country's reputation to create vintages of high quality.

When snowfall is heavy, the snow leopard is known to descend to lower elevations and frequent mountain slopes whose conditions also are favorable to the leopard's prey, such as the markor.

Today, because of the greater efficiency of communicating online, a typical business meeting is attended by double the people that it has been in 1995.

Born in Portsmouth, England, Charles Dickens, often regarded as the greatest novelist of the Victorian period, worked in a blacking factory at the age of 12, became a journalist as a young adult, and in 1842 published a travelogue about the United States after he had visited that country for the first time.

Evidence suggests that the people who crossed the Bering Strait from Asia into North America over a land bridge were hunter-gatherers, nomads living in an egalitarian society where they obtained their sustenance almost entirely from wild plants and animals.

Sir William Mills, the inventor of both the Mills bomb, the hand grenade most widely used by British Imperial forces during the First World War, and also of the Metallic Golfing Instrument Head, possibly the first aluminum golf club, was known as an innovative world-renowned inventor.

Also known as the Tasmanian tiger, the thylacine, a species most observers agree to be driven to extinction by predation by humans, was the largest known carnivorous marsupial of modern times.

To popularize the asteroid theory of dinosaur extinction, paleontologists have to provide somewhat stronger evidence than now linking the disappearance of fossil records and the layer of sediment in the Earth's crust caused by an asteroid impact.

Whereas in genetic mutation by insertion extra base pairs are inserted into the DNA, in mutation by substitution one base in the sequence is replaced with another.

The term "sustainable" is widely applied to any practice that minimizes environmental impact, but in the case of building material it is a substance that is recycled or contains lower volumes of volatile organic compounds.