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Re: Is x>0?

Is x>0? 1) x^2=9x 2) x^2=81 OA C Source: Veritas Prep 1) \(x^2=9x \Rightarrow x^2-9x =0 \Rightarrow x(x-9)=0\) \(x\) can be \(0\) or \(9\). No Sufficient \(\Large{\color{red}\chi}\) 2) \(x^2=81 \Rightarrow x^2-81=0 \Rightarrow (x-9)(x+9)=0\) \(x\) can be \(-9\) or \(9\). Not Sufficient \(\Large{\co...

by swerve

Mon Jun 27, 2022 10:07 am
Forum: Data Sufficiency
Topic: Is x>0?
Replies: 1
Views: 29

Re: If S is a finite set of consecutive even numbers, is the median of S an odd number?

If S is a finite set of consecutive even numbers, is the median of S an odd number? (1) The mean of set S is an even number. (2) The range of set S is divisible by 4. OA D Source: Manhattan Prep We need to recall the following for this problem: - "If the number of terms in a set of consecutive even...


Re: Due to construction, the speed limit along an 8-mile section of highway is reduced from 55 miles per hour to 35 mile

Due to construction, the speed limit along an 8-mile section of highway is reduced from 55 miles per hour to 35 miles per hour. Approximately how many minutes more will it take to travel along this section of highway at the new speed limit than it would have taken at the old speed limit ? (A) 5 (B)...


Re: John has 5 friends who want to ride in his new car that can accommodate only 3 passengers at a time. How many differ

John has 5 friends who want to ride in his new car that can accommodate only 3 passengers at a time. How many different combinations of 3 passengers can be formed from the 5 friends? A) 3 B) 8 C) 10 D) 15 E) 20 OA C Source: GMAT Prep Let's try as follows, There are only \(3\) places\(: + + + \) But...


Re: Ten years ago, Dorothy deposited a certain amount of money in Account A at a 3% simple annual interest rate. At the

Ten years ago, Dorothy deposited a certain amount of money in Account A at a 3% simple annual interest rate. At the same time, Marla deposited another amount in Account B at a 4% simple annual interest rate. If there were no withdrawals or deposits during the 10 years since the deposits, is the cur...


Re: Mark’s clothing store uses a bar-code system to identify every item. Each item is marked by a combination of 2 lette

Mark’s clothing store uses a bar-code system to identify every item. Each item is marked by a combination of 2 letters followed by 3 digits. Additionally, the three-digit number must be even for male products and odd for female products. If all apparel products start with the letter combination AP,...


Re: If the measure of one of the interior angles of a quadrilateral is

If the measure of one of the interior angles of a quadrilateral is 110° what is the sum of the measures of the other 3 interior angles? A. 220° B. 250° C. 300° D. 330° E. 360° OA B Source: Princeton Review First, recall the following The sum of all of the interior angles of a quadrilateral is equal...


Re: A hotel has two types of rooms: basic and deluxe. On a certain night, the hotel rented 75% of its rooms, including 2

A hotel has two types of rooms: basic and deluxe. On a certain night, the hotel rented 75% of its rooms, including 2/3 of its basic rooms. What percentage of the rooms that were not rented on that night were basic? (1) 60% of all the rooms in the hotel are basic (2) On that night, 12.5% of the delu...


Re: If the length of a rectangle is decreased by 10% and its width is decreased by 20%, by what percent does its area

If the length of a rectangle is decreased by 10% and its width is decreased by 20%, by what percent does its area decrease? A. 30% B. 28% C. 25% D. 23% E. 15% OA B Source: Princeton Review Area of rectangle \(=\) length * breadth Area \(= l*b\) New length \(=0.9 l\) New breadth \(=0.8 b\) New area ...


Re: Which of the following, if solved, would yield the set of all real numbers that are exactly 15 units away from -3?

Which of the following, if solved, would yield the set of all real numbers that are exactly 15 units away from -3? A. |x + 3| = 15 B. |x - 3| = 15 C. |x - 15| = 3 D. |x + 15| = 3 E. |x + 15| = -3 OA A Source: Veritas Prep \(15\) units away from \(-3 = -3+15=12\) and \(-3-15=-18\) In A we have \(x+3...


Re: Edwin is planning to drive from Boston to New Orleans. By what percent would his travel time be reduced if Edwin dec

Edwin is planning to drive from Boston to New Orleans. By what percent would his travel time be reduced if Edwin decides to split the driving time equally with his friend George, instead of making the trip alone? (1) The driving distance from Boston to New Orleans is 1500 miles. (2) George’s drivin...


Re: Peter works as a teaching assistant and gets paid on a weekly basis. He gets paid D dollars per hour for the first 3

Peter works as a teaching assistant and gets paid on a weekly basis. He gets paid D dollars per hour for the first 30 hours and (D+ 10) dollars per hour for the hours worked in excess of 30 hours. What is the value of D? (1) Last week Peter worked for 32 hours. (2) Peter got paid $8(D+10) more if w...


Re: The sum of 3 hours 45 minutes and 2 hours 55 minutes is approximately what percent of a day?

The sum of 3 hours 45 minutes and 2 hours 55 minutes is approximately what percent of a day? (A) 14% (B) 16% (C) 24% (D) 28% (E) 72% OA D Source: GMAT Prep Try as follows \(3h45+2h55= 5h(45+55)=5h(1h40)=6h40\) Then, \(100\% \cdot \dfrac{6h40}{24h}\) is between \(~ \dfrac{6\cdot4}{100}\; ~24\%\) and...


Re: A company plans to assign identification numbers to its employees. Each number is to consist of four different digit

A company plans to assign identification numbers to its employees. Each number is to consist of four different digits from 0 to 9, inclusive, except that the first digit cannot be 0. How many different identification numbers are possible? (A) 3,024 (B) 4,536 (C) 5,040 (D) 9,000 (E) 10,000 OA B Sour...


Word Problems

A vendor sells specialty gift baskets at a price of \(\$50.00\) per basket, which represents a markup of \(25\%\) above the cost to produce each basket. The vendor prepared and delivered an order of \(120\) baskets to a customer. However, that customer returned \(15\) baskets and requested a partial...

by swerve

Sun Feb 20, 2022 5:18 am
Forum: Problem Solving
Topic: Word Problems
Replies: 0
Views: 138