IQ test

IQ (intelligence quotient) is a measure of intelligence. Answer the following thirty questions for an indication of how intelligent you are.

If athletes want better performances, they should train
at higher altitudes. At higher altitudes, the body has
more blood cells per unit volume of blood
than at sea level. The red blood cells transport
oxygen, which will improve performance if
available in greater amounts. The blood of an athlete,
who trains at high altitudes, will transport more
oxygen per unit volume of blood, improving the
athlete’s performance.

Which of the following, if true,
would be most damaging to the argument above,
provided that the athlete’s heart rate is
the same at high and low altitudes?

Tinea is a skin infection caused by certain fungi.
Significant fractions of the people who contract tinea
have outbreaks of its symptoms again and again.
This proves that for each of these individuals, the
original case of tinea was, in fact, never
completely cured.

The argument above assumes that a person
who has outbreaks of tinea symptoms again and again

In 1988 unemployment in some regions of the United States dropped to the lowest rate in ten years, while the rates in other regions reached an all-time high. In 1978 similar conditions led to large migrations of workers from regions with high unemployment to regions with low unemployment. There was, however, significantly less such migration in 1988.

Which of the following, if true about 1988, would contribute most to explaining
why there was less migration of workers in 1988?

Sometime during the 1950’s rock music permanently ousted jazz from the music scene.
This is evident from the behaviour of youths of that time.
In crowded nightclubs they would applaud rock acts enthusiastically.
But when a jazz act began, they went outside and got refreshments.
They came back in, only when the jazz set was finished.

Which of the following statements, if true, is a valid objection to the conclusion drawn above?

Between 1950 and 1965, the federal government spent one third more on the research and development
than industry did from its own funds. In 1980 for the first time, industry spent more on research and development
than the federal government did. Representatives of industry claim that these statistics show an increased commitment
on the part of industry to develop competitive products.

Which of the following, if true, would help to refute the claim of the representatives of the industry?

Computer programmes are unusual in that they are virtually the only products
that have been protected both by patent and by copyright.
Patents protect the idea behind an innovation, whereas copyright protects the expression of that idea.
However, in order to win either protection, the idea must be clearly distinguished from its expression.

Which of the following can be properly inferred from the statements above?

Psychological maladjustment in children is caused by the stress of the birthing process
as is proved by the discovery of a positive relationship between the duration of the mother’s labour
and the amount of time the child spent crying in the first month of life.

Which of the following, if true, LEAST damages the author's assertion?

Some soil scientists have asserted that decaying matter on the forest floor is
a far greater source of acidity in mountain lakes than is the acid rain that falls on these lakes.
Therefore, they contend, reducing acid rain will not significantly reduce the acidity levels of mountain lakes.

Which of the following statements, if true, most seriously weakens the argument above?

Dense snow can cause unusually harsh weather patterns to persist. If a severe winter storm blankets the Great Plains
, the snow cover reflects the sun’s radiation back into space and thus keeps the temperature of the ground low.
Consequently, cold air moving down from Canada remains cold enough to cause more snowstorms.

Which of the following is a conclusion that can be properly drawn from the information above?

According to a 1980 survey, ten percent of all United States citizens over the age of sixteen are functionally illiterate.
Therefore, if the projection that there will be 250 million United States citizens over sixteen in the year 2000 is correct,
we project that 25 million of these citizens will be functionally illiterate.

Which of the following, if true, would most weaken the conclusion drawn by the author of the passage above?

A worldwide ban on the production of certain ozone-destroying chemicals would provide only an illusion of protection. Quantities of such chemicals, already produced, exist as coolants in millions of refrigerators. When they reach the ozone layer in the atmosphere, their action can not be halted. So there is no way to prevent these chemicals from damaging the ozone layer further.

Which of the following, if true, most seriously weakens the argument above?

Popular culture in the United States has become Europeanized to an extent unimaginable twenty-five years ago.
Not many people then drank wine with meals, and no one drank imported mineral water.
No idea would have been more astonishing than that Americans would pay to watch soccer games.
Such thoughts arise because of a report that the American Association of State Highway and Transportation Officials
has just adopted a proposal to develop
the country’s first comprehensive interstate system of routes for bicycles.

Which of the following inferences is best supported by the passage?

Roberta was born in 1967, and so in 1976 she was nine years old. It is clear from this example that the last two digits
of a person’s birth year will be the same as the last two digits of the year of that person’s ninth birthday,
except that the position of the digits will be reversed.

Which if the following is the best criticism of the assertions made above?

In a recent study, sedentary middle-aged men who drink more than two cups of coffee a day,
were found more likely than other sedentary middle-aged men to have a high blood level of cholesterol,
which is a factor increasing risk of heart disease.
Cholesterol can reach the blood from food and drink, but is not contained in coffee.

Which of the following, if true, most seriously weakens a conclusion from the study that for sedentary middle-aged men
coffee increases the risk of heart attack?

Despite the fact that the health-inspection procedures for the catering establishments are
more stringent than those for ordinary restaurants, more of the cases of food poisoning reported to
the city health were brought on by banquets served by catering services
than were brought on by restaurant meals.

Which of the following, if true, helps explain the apparent paradox in the statement above?

The widespread development of industrial robots is contributing to unemployment; therefore, “intelligent” machines are dangerous.

The argument is most like which of the following statements?

Substances suspected of causing cancer, if carefully administered to experimental animals in quantities
in which those substances are ordinarily present in the environment,
are virtually guaranteed not to produce cancer at rates significantly above the chance level.
The most economical procedure for obtaining informative data is to administer vastly increased amounts of the substance being tested.

The 'economical procedure' described above will not be an effective one if which of the following is true?

The expression “the doctrine of unshakeable foundations” was once used by a critic in an effort
to illuminate the dogmatic nature of certain economic and political issues whose adherents,
when confronted with the failure of a policy designed to put their philosophy into practice,
can conceive only of one reaction: to design another, different policy for putting it into practice.

It can be inferred from the passage above that the critic would approve if the adherents:

Senator: Jones is highly qualified for appointment as a judge as evidenced by Jones’s receiving a unanimous vote of “qualified”
on the formal rating scale used by the Lawyers’ Committee. That committee advises the Senate on judicial appointments.

Which of the following, if true, is the best reason for dismissing the senator's claim that Jones is highly qualified?

Why can human beings outlast many faster four-legged animals when running long distances?
Perhaps because early humans evolved as hunters on the hot African savannas.
Humans developed the ability to release heat by sweating, but most mammals must pant, a function hard to regulate while running.
Also, four-legged animals must adopt a pace that lets them breathe once in mid-stride:
otherwise, the impact of the front legs hitting the ground will prevent deep inhalation.
Humans can vary the number of breaths per stride, set a pace unsuited to the prey, and so eventually exhaust it.

The author's explanation of why human beings have evolved as superior distance runners would be most weakened if it were shown that:

Nineteenth-century art critics judged art by the realism of its method or representation.
It was assumed that the realistic method developed from primitive beginnings to the perfection of formal realism.
It is one of the permanent gains of the aesthetic revolution of the 20th century that we are rid of this type of aesthetics.

It can be inferred from the passage above that the artistic revolution of the 20th century had which of the following effects?

From a certain farming region, trucks can carry vegetables to market in New Mexico in two days for a total cost of $300.
A train will carry the vegetables there in four days for $200.
If reducing time in transit is more important to the owner of the vegetables than is reducing the shipping bill,
he or she will send the vegetables by truck.

Which of these is an assumption made in the passage above?

In any negotiations between a party with limited aims and an opposing party with unlimited aims,
the party with limited aims is bound to lose. This is so because the scope of a negotiating party’s aims
determines the energy and the perseverance that will be brought to the negotiations by that party.

Which of the following is an assumption implicit in the passage above?

The popular notion that teachers are generally apathetic about microcomputer technology is false.
Or at least dated: a recently published survey indicates that 86 percent of the 5 000 teachers who responded to survey questionnaires
expressed a high level of interest in microcomputers.

Which of the following, if true, would be most damaging to the argument above?

In mammals it is the secondary palate that permits breathing while eating.
Clearly, breathing while eating is necessary to maintain the high rate of metabolism in mammals.

The author's assertions would be most weakened by the discovery of a mammalian species that had a:

A study of attitudes toward new cars showed that cars that were identical
in every aspect except colour received widely differing ratings for quality from potential buyers.
Therefore, in future advertisements for cars of high quality,
we can expect to see no variety in the colour of the car featured.

Which of the following is an assumption made in the passage above?

Nonprescription sunglasses shield the wearer’s eyes from damaging ultraviolet sunlight.
Squinting, however, provides protection from ultraviolet rays that is at least as good as the protection from nonprescription
sunglasses. There is, therefore, no health advantage to be gained by wearing nonprescription sunglasses rather than squinting.

Which of the following, if true, most seriously weakens support for the conclusion above?

Whenever Ned is outdoors and the sun is shining, Ned wears his sunglasses.
Whenever Net is outdoors and the sun is not shining, Ned carries his sunglasses in his pocket.
Sometimes the sun is shining when Ned is not outdoors.

If the statements above are true and Ned is not wearing his sunglasses,
which of the following statements must also be true?

An acre of average farmland produces only about 400 pounds of grain amaranth,
as against 2 400 pounds per acre, or six times as much, for wheat.
It follows that whenever the grain amaranth price is projected to be more than six times the projected price of wheat,
farmers wishing to maximize profits will grow grain amaranth rather than wheat.

The argument above is based on which of the following assumptions?

The plant called the scarlet gilia can have either red or white flowers.
It had long been thought that hummingbirds, which forage by day,
pollinate its red flowers and that hawkmoths, which forage at night,
pollinate its white flowers. To try to show that this pattern of pollination by colours exists,
scientists recently covered some scarlet gilia flowers only at night and others only by day:
plants with red flowers covered at night became pollinated;
plants with white flowers covered by day became pollinated.

Which of the following, if true, would be additional evidence to suggest that hummingbirds
are attracted to the red flowers and hawkmoths to the white flowers of scarlet gilia?