|
|
In a large investment firm, 25 percent of the male employees and 30 percent of the female employees are stockbrokers. If 60 percent of the firm's employees are males, what is the ratio of the number of male stockbrokers to the number of female stockbrokers?
|
|
|
Each participant in a certain study was assigned a sequence of 3 different letters from the set {A, B, C, D, E, F, G, H}. If no sequence was assigned to more than one participant and if 36 of the possible sequences were not assigned, what was the number of participants in the study? (Note, for example, that the sequence A, B, C is different from the sequence C, B, A.)
|
|
OG18-数学分册
|
Of the total amount that Jill spent on a shopping trip, excluding taxes, she spent 50 percent on clothing, 20 percent on food, and 30 percent on other items. If Jill paid a 4 percent tax on the clothing, no tax on the food, and an 8 percent tax on all other items, then the total tax that she paid was what percent of the total amount that she spent, excluding taxes?
|
|
OG17
|
In the xy-plane, the vertices of a triangle have coordinates (0, 0), (3, 3), and (7, 0). What is the perimeter of the triangle?
|
|
|
A thoroughly blended biscuit mix includes only flour and baking powder. What is the ratio of the number of grams of baking powder to the number of grams of flour in the mix?(1)Exactly 9.9 grams of flour is contained in 10 grams of the mix.(2)Exactly 0.3 gram of baking powder is contained in 30 grams of the mix.
|
|
OG12 OG15
|
What is the value of $$\mid x\mid $$ ?(1)$$x = -\mid x \mid$$(2)$${x}^{2}$$ = 4
|
|
|
Is r greater than 0.27?(1)r is greater than$$\frac1 4$$(2)r is equal to$$\frac3 {10}$$
|
|
OG12 OG15
|
What percent of a group of people are women with red hair?(1)Of the women in the group, 5 percent have red hair.(2)Of the men in the group, 10 percent have red hair.
|
|
|
If 5x+ 3y = 17, what is the value x?(1)x is a positive integer.(2)y = 4x
|
|
|
Is x greater than 1.8?(1)x>1.7(2)x>1.9
|
|
PREP07 Test 1
|
Many small roads do not have painted markings along their edges. Clear edge markings would make it easier for drivers to see upcoming curves and to judge the car's position on the road, particularly when visibility is poor, and would therefore seem to be a useful contribution to road safety. However, after Greatwater County painted edge markings on all its narrow, winding roads, the annual accident rate along those roads actually increased slightly.Which of the following, if true, most helps to explain the increase in accident rate?
|
|
PREP07 Test 1 OG18-语文分册
|
Gortland has long been narrowly self-sufficient in both grain and meat. However, as per capita income in Gortland has risen toward the world average, per capita consumption of meat has also risen toward the world average, and it takes several pounds of grain to produce one pound of meat. Therefore, since per capita income continues to rise, whereas domestic grain production will not increase, Gortland will soon have to import either grain or meat or both.Which of the following is an assumption on which the argument depends?
|
|
OG16 PREP07 Test 1
|
For years the beautiful Renaissance buildings in Palitito have been damaged by exhaust from the many tour buses that come to the city. There has been little parking space, so most buses have idled at the curb during each stop on their tour, and idling produces as much exhaust as driving. The city has now provided parking that accommodates a third of the tour buses, so damage to Palitito's buildings from the buses' exhaust will diminish significantly.Which of the following, if true, most strongly supports the argument?
|
|
PREP07 Test 1 PREP2012
|
Traces of cultivated emmer wheat have been found among the earliest agricultural remains of many archaeological sites in Europe and Asia. The only place where the wild form of emmer wheat has been found growing is a relatively narrow strip of southwest Asia. Since the oldest remains of cultivated emmer wheat yet found are from village sites in the same narrow strip, it is clear that emmer wheat was first domesticated somewhere in that strip.Which of the following, if true, most strengthens the argument?
|
|
PREP07 Test 1
|
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
|
|
PREP07 Test 1
|
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages. This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously. Yet the city's population growth has not significantly accelerated.Which of the following, if true, most helps to explain why the city's population growth rate has not changed?
|
|
PREP07 Test 1
|
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage. Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer. However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.In the argument given, the two portions in boldface play which of the following roles?
|
|
PREP07 Test 1
|
To reduce the danger to life and property posed by major earthquakes, scientists have been investigating several techniques for giving advance warning of dangerous earthquakes. Since catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.Which of the following, if true, most seriously undermines the usefulness of the proposal?
|
|
PREP07 Test 1
|
A city plans to attract new citizens with new housing and new facilities such as parks, recreation centers, and libraries. One component of the city's plan is to require that developers seeking permission to build this new housing provide these additional facilities at no cost to the city.Which of the following, if true, would point to a possible flaw in the city's plan?
|
|
PREP07 Test 1
|
For several years, per capita expenditure on prescription drugs in Voronia rose by fifteen percent or more annually. In order to curb these dramatic increases, the ministry of health prohibited drug manufacturers from raising any of their products' prices. Even though use of prescription drugs did not expand after this price freeze, per capita expenditure for prescription drugs continued to increase by a substantial percentage each year.Which of the following, if true, most helps to explain why the ministry's action did not achieve its goal?
|