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Ready4 <p>If u<v<w and x<y<z, is v<y?p>
  1. u<x
  2. w<x
GMAT、gmat题库、gmat模考、gmat考满分If stock is sold three months after it is purchased, the formula above relates p, d, s, and r, where p is the purchase price of the stock, d is the amount of any dividend received, s is the selling price of the stock, and r is the yield of the investment as a percent.If Rose purchased $400 worth of stock received a $5 dividend and sold the stock for $420, for three months after purchasing it, what was the yield of her investment, according to the formula?(Assuming she paid no commissions.)
In isosceles triangle PQR, if the measure of angle P is 80º, which of the following could be the measure of angle R?I. 20ºII. 50ºIII. 80º
190215 6,mn4 is a four-digit integer. Is m+n larger than 10? 1: 134 is a factor of 6,mn4. 2: 6,mn4=134p + r (47 ≤ p ≤ 52,0 ≤ r ≤ 134)
Ready4 <p>The rectangular quilt shown in the figure above has a border of uniform width. What is the area of the portion of the quilt that excludes the border?p> <p>(1) The width of the border on all sides is 4 inches.p> <p>(2) The perimeter of the entire quilt, including the border, is 220 inches. The length of the entire quilt is 20 inches longer than the width of the entire quilt.p>
GWD The passage supports which of the following Statements about the relationship between the epicenter and the focus of an earthquake?
Ready4 <p class="ng-scope" zoompage-fontsize="14">     Koltsov predicted in 1927 that an organism's inherited traits are determined by gradual changes in a “giant hereditary molecule,” later known as DNA, that is the building block of the genome that determines an organism's genetic makeup. This hypothesis was unproven, for a time, because of limitations in experimental methodology and an inability to do much more than observe qualities of an organism's DNA compared to the traits it expressed.p> <p class="ng-scope" zoompage-fontsize="14">     To determine the nature of the connection between DNA and heritable characteristics, scientists needed to be able to bring about changes in the genome and observe whether they corresponded to physical changes in the organism. An experiment conducted by Zimmer in 1935 indicated that this was possible: radiation applied to living tissue can change the structures of DNA and another nucleic acid, RNA, that are found in the cells of every organism. Most of the exposed molecules go unchanged in this experiment, but some of them respond to experimental pressures. When X-rays are applied to cells, the nucleic acids warp and rearrange themselves, sometimes dramatically altering the traits they cause the organism to express. Because the changes induced by radiation exposure are more rapid and intense than those brought about by natural selection, significantly altered heritable traits can be observed in a single generation.p> <p class="ng-scope" zoompage-fontsize="14">    As a proof of the connection between DNA and heritable characteristics, radiation experiments have two advantages. First, they are universally applicable: the genome of any organism responds to radiation exposure in a way comparable to any other organism. Second, it is a more direct means of genetic intervention than other methods like selective breeding. These advantages mean that radiation experiments can be used to isolate the hereditary influence of DNA from other confounding variables. The results of these experiments demonstrate that DNA exerts a substantial influence on the hereditary characteristics organisms express: DNA is the way that organisms transfer heritable traits between generations. These experiments have established an unassailable connection between intergenerational biological change and the information contained within the building blocks of the genome.p> <p class="ng-scope" zoompage-fontsize="14">    However, it is important to note that there are other biological mechanisms, such as epigenetics and certain environmental pressures, that also affect the expression of inherited characteristics. The advantage of the Koltsov theory is its broad applicability; DNA is present in every organism on earth, which is not true of the various other factors that might have a role to play in determining the expression of heritable characteristics. That said, the comparative immeasurability of these other potential influences does not make them unworthy of study.p>
Ready4
Work Order Number
Fraction of Total Job
<p>Lise receives batches of work orders from her supervisor. Her supervisor would like her to complete a total of 6 work orders on Thursday and Friday of this week. The table above shows the fraction each work order represents as a part of the total job. Assume Lise completes an entire work order in one sitting. Each work order is labeled either , , , , , or . If the work orders on Thursday made up more than of the total job, was  completed on Thursday?p> <p>p> <p>(1) Lise completed  on Thursday.p> <p>(2) Lise completed exactly three work orders on Friday.p>
Ready4 <p>A box contains only pens, pencils, and pads. If an item is randomly selected from the box, what is the probability that the item will be either a pencil or a pad?p>
  1. The probability that the item will be a pad is 14.
  2. The probability that the item will be a pen is 13.
Ready4 <p>The cost of an item offered by Company A increased by 15 percent while the cost of that item offered by Company B decreased by 15 percent. The reduced price of Company B's item was what percent of the original price of Company A's item?p>
  1. The increased price of Company A's item was equal to the original price of Company B's item.
  2. The amount of increase in the price of Company A's item was 1 1.15 the amount of decrease in the price of Company B's item.
Ready4 <p>If y and z are integers, what is the value of y+z?p>
  1. y+z<8 and y+z>6.
  2. 1< y 2 < z 2 <2.5
Ready4 <p>If k is a positive integer, is ( 1 2 ) k >0.125?p>
  1. k>3
  2. ( 1 2 ) k−1 <0.25
Ready4 <p>If z → denotes the greatest integer less than or equal to z, is z → =1?p>
  1. 8z−1=−13+5z
  2. 1<z<2
Ready4 <p>The profits of a new company were x percent higher in the second year than the first year and y percent lower in the third year than the second year. Were the profits higher in the third year than the first year?p>
  1. 1−x<1−y
  2. xy 100 <x−y
Ready4 <p>p> <p>What is the area of the circle above with center O?p>
  1. The area of ΔOAB is 50.
  2. The length of arc ACB is 15π.
OG18-数学分册 Stations X and Y are connected by two separate, straight, parallel rail lines that are 250 miles long. Train P and train Q simultaneously left Station X and Station Y, respectively, and each train traveled to the other's point of departure. The two trains passed each other after traveling for 2 hours. When the two trains passed, which train was nearer to its destination?(1)At the time when the two trains passed, train P had averaged a speed of 70 miles per hour.(2)Train Q averaged a speed of 55 miles per hour for the entire trip.
OG19-数学分册 Stations X and Y are connected by two separate, straight, parallel rail lines that are 250 miles long. Train P and train Q simultaneously left Station X and Station Y, respectively, and each train traveled to the other's point of departure. The two trains passed each other after traveling for 2 hours. When the two trains passed, which train was nearer to its destination? (1) At the time when the two trains passed, train P had averaged a speed of 70 miles per hour. (2) Train Q averaged a speed of 55 miles per hour for the entire trip.
Ready4 <p>If n and m are positive, is m<9<n?p>
  1. m<n and mn=81.
  2. m 2 <81< n 2
Ready4 <p>Running at their respective constant rates, Machine M takes 4 days longer to produce x widgets than Machine N. At these rates, if the two machines together produce widgets in 2 days, how many days would it take Machine M alone to produce widgets?p>
190113 The sequence $$a_1$$,$$a_2$$,......$$a_n$$ , such that $$a_3$$=$$a_1$$+$$a_2$$,$$a_4$$=$$a_1$$+$$a_2$$+$$a_3$$,$$a_n$$=$$a_1$$+$$a_2$$+......+$$a_{n-1}$$.If $$a_n$$=p,what is the value of $$a_{n+2}$$.when n is greater than 2?