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If $${25}({5}^{x})={1}$$ then x=
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A shipment of 8 television sets contains 2 black-and-white sets and 6color sets. If 2 television sets are to be chosen at random from this shipment, what is the probability that at least 1 of the 2 sets chosen will be a black-and-white set?
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The tens digit of positive integer X is 3. Is the units digit of X greater than 4?(1) The units digit of 2X is less than the units digit of X.(2) The tens digit of 2X is 7.
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During a 10-week summer vacation, was the average (arithmetic mean) number of books that Carolyn read per week greater than the average number of books that Jacob read per week?(1) Twice the average number of books that Carolyn read per week was greater than 5 less than twice the average number of books that Jacob read per week.(2) During the last 5 weeks of the vacation, Carolyn read a total of 3 books more than Jacob.
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KMFDS
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If $${X}^{2}+{Y}^{2}={1}$$, is X+Y=1?(1) XY=0(2) Y=0
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OG16
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A total of 22 men and 26 women were at a party, and the average (arithmetic mean) age of all of the adults at the party was exactly 35 years. If the average age of the men was exactly 38 years, which of the following was closest to the average age, in years, of the women?
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A parent established a college fund for his daughter. Each year the parent made a contribution to the fund, and each year he increased his contribution by a constant amount. If he made a contribution of $800 in the first year, by what amount did the parent increase his contribution to the fund each year?(1) The parent's contribution to the fund in the 18th year was $7600.(2) The parent's contribution to the fund in the 7th year was twice what it was in the 3rd year.
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Anne traveled from City A to City B in 4 hours, and her speed was between 25 miles per hour and 45 miles per hour. John traveled from City A to City B along the same route in 2 hours, and his speed was between 45 miles per hour and 60 miles per hour. Which of the following could be the distance, in miles, from City A to City B?
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A certain carton holds fewer than 50 books. What is the number of books in the carton?(1) The books in the carton can be divided into 3 stacks of X books each, with 2 books left over.(2) The books in the carton can be divided into Y stacks of 7 books each, with 2 books left over.
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 The figure above shows the dimensions of a semicircular cross section of a one-way tunnel. The single traffic lane is 12 feet wide and is equidistant from the sides of the tunnel. If vehicles must clear the top of the tunnel by at least $$\frac{1}{2}$$ foot when they are inside the traffic lane, what should be the limit on the height of vehicles that are allowed to use the tunnel?
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 The figure above is a cube. What is the measure of angle BEG (not shown)?
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GWD
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Written in ink or engraved by stylus, more than 2,000 letters and documents on wooden tablets excavated at the site of the old roman fort at vindolanda in northern England are yielding a historical account of the military garrison in the first and second centuries that are so vivid in their details about personal life as they are from Pompeii.
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应用题
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A certain one-day seminar consisted of a morning session and an afternoon session. If each of the 128 people attending the seminar attended at least one of the two sessions, how many of the people attended the morning session only?(1) $$\frac{3}{4}$$ of the people attended both sessions.(2) $$\frac{7}{8}$$ of the people attended the afternoon session.
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PREP07 Test 1
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A bookstore that sells used books sells each of its paperback books for a certain price and each of its hardcover books for a certain price. If Joe, Maria, and Paul bought books in this store, how much did Maria pay for 1 paperback book and 1 hardcover book?(1) Joe bought 2 paperback books and 3 hardcover books for $12.50.(2) Paul bought 4 paperback books and 6 hardcover books for $25.00.
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If a is a positive integer, and if the units digit of $$\mathbf{a}^{2}$$ is 9 and the units digit of $$\mathbf({a}+{1})^{2}$$ is 4, what is the units digit of $$\mathbf({a}+{2})^{2}$$ ?
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If $$({2}^{x})({2}^{y})={8}$$ and $$({9}^{x})({3}^{y})={81}$$, then (x, y)=
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If $$\frac{x}{y}=\frac{3}{2}$$,then $$\frac{x-y}{x}=$$
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KMFPS
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A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box, what is the probability that the sum of the three numbers on the balls selected from the box will be odd?
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0---:-|---:--|-:--:-|--:---|-:----1On the number line above, the segment from 0 to 1 has been divided into fifths, as indicated by the large tick marks, and also into sevenths, as indicated by the small tick marks. What is the least possible distance between any two of the tick marks?
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$$\frac{1}{{1}-\mathbf({\frac{1}{{2}-\frac{1}{3}}\mathbf)}}$$
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