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Re: If Ann saves \(x\) dollars each week and Beth saves \(y\) dollars each week, what is the total amount that they save

If Ann saves \(x\) dollars each week and Beth saves \(y\) dollars each week, what is the total amount that they save per week? (1) Beth saves \(\$5\) more per week than Ann saves per week. (2) It takes Ann \(6\) weeks to save the same amount that Beth saves in \(5\) weeks. Answer: C Source: Officia...


Re: HELP PLEASE - Distributive property with !

Alyssa345 wrote:
Fri Jun 18, 2021 1:53 pm
How does the GMAT book come up with

k(k-1)! = k!

I always come up with (kk!)-k as a result.
I really don't understand how they use distributive property in this one.
Here's an example:
6(6 - 1)! = 6(5!)
= (6)(5)(4)(3)(2)(1)
= 6!

by [email protected]

Mon Jun 21, 2021 11:57 am
Forum: Problem Solving
Topic: HELP PLEASE - Distributive property with !
Replies: 2
Views: 16

Re: What is the range of the prime factors of x, where x is 275?

AAPL wrote:
Mon Jun 21, 2021 8:25 am
Magoosh

What is the range of the prime factors of x, where x is 275?

A. 5
B. 6
C. 11
D. 30
E. 55

OA B
Let's first find the prime factorization of 275...

275 = (5)(5)(11)

Range = 11 - 5 = 6

Answer: B

Cheers,
Brent


Re: What is the value of \(\dfrac{r}2 + \dfrac{s}2?\)

What is the value of \(\dfrac{r}2 + \dfrac{s}2?\) (1) \(\dfrac{r + s}2 = 5\) (2) \(r + s = 10\) Answer: D Source: GMAT Paper Tests Target question : What is the value of r/2 + s/2? This is a great candidate for REPHRASING the target question. Since both fractions have the same denominator, we can a...

by [email protected]

Fri Jun 18, 2021 10:52 am
Forum: Data Sufficiency
Topic: What is the value of \(\dfrac{r}2 + \dfrac{s}2?\)
Replies: 1
Views: 35

Re: Last month \(15\) homes were sold in Town \(X.\) The average (arithmetic mean) sale price of the homes was \(\$150,0

Last month \(15\) homes were sold in Town \(X.\) The average (arithmetic mean) sale price of the homes was \(\$150,000\) and the median sale price was \(\$130,000.\) Which of the following statements must be true? I. At least one of the homes was sold for more than \(\$165,000.\) II. At least one o...


Re: Percent And Interest Problems

To determine her state income tax last year, Elena computed 5 percent of her gross income, rounded the resulting figure down to the nearest $100, and subtracted $50 for each dependent that she claimed. If Elena's gross income was $34,500 and she claimed 2 dependents, how much did she determine her ...

by [email protected]

Fri Jun 18, 2021 5:03 am
Forum: Problem Solving
Topic: Percent And Interest Problems
Replies: 1
Views: 37

Re: Edward has four pearls – two white and two black – which he can distribute as he chooses between two identical bags.

Edward has four pearls – two white and two black – which he can distribute as he chooses between two identical bags. He must then choose a bag at random and pick one pearl at random from the bag he chose. If Edward distributes the pearls so as to maximize his chances of pulling a black pearl, what ...


Re: Health insurance Plan A requires the insured to pay $1000 or 50% of total cost, whichever is lower. Plan B requires

Source: Manhattan Prep Health insurance Plan A requires the insured to pay $1000 or 50% of total cost, whichever is lower. Plan B requires the insured to pay the initial $300, but then pays 80% of the cost over $300. Which of the following is a cost level for which both insurance plans pay out the ...


Re: Is the perimeter of square \(S\) greater than the perimeter of equilateral triangle \(T?\)

Is the perimeter of square \(S\) greater than the perimeter of equilateral triangle \(T?\) (1) The ratio of the length of a side of \(S\) to the length of a side of \(T\) is \(4:5.\) (2) The sum of the lengths of a side of \(S\) and a side of \(T\) is \(18.\) Answer: A Source: Official Guide Target...


Re: OG A worker carries jugs of liquid soap

A worker carries jugs of liquid soap from a production line to a packing area, carrying 4 jugs per trip. If the jugs are packed into cartons that hold 7 jugs each, how many jugs are needed to fill the last partially filled carton after the worker has made 17 trips? A. 1 B. 2 C. 4 D. 5 E. 6 B Did yo...

by [email protected]

Wed Jun 16, 2021 3:37 pm
Forum: Problem Solving
Topic: OG A worker carries jugs of liquid soap
Replies: 3
Views: 2731

Re: An office has 6 employees; there are 5 female employees and 1 male employee. In how many ways can a 3-person

Source: Magoosh An office has 6 employees; there are 5 female employees and 1 male employee. In how many ways can a 3-person committee be created if the committee must include the male employee? A. 10 B. 12 C. 15 D. 24 E. 30 The OA is A In order to ensure that the 3-person committee includes the ma...


Re: The function f is defined by \(f(x)=\sqrt{x}-10\) for all positive numbers x. If u=f(t) for some positive numbers t

Official Guide The function f is defined by \(f(x)=\sqrt{x}-10\) for all positive numbers x. If u=f(t) for some positive numbers t and u, what is t in terms of u? A. \(\sqrt{\sqrt{u}+10}\) B. \((\sqrt{u}+10)^2\) C. \(\sqrt{u^2+10}\) D. \((u+10)^2\) E. \((u^2+10)^2\) OA D f(x) = √x - 10 So, f(t) = √...


Re: Helen mixes a first solution, 4 liters of 40% concentrated sulfuric acid solution, with a second solution, 5 liters

Helen mixes a first solution, 4 liters of 40% concentrated sulfuric acid solution, with a second solution, 5 liters of a sulfuric acid solution with a stronger concentration, and the resultant solution is 9 liters of 50% concentrated sulfuric acid solution. What was the concentration, as a percent,...


Re: Seven children — A, B, C, D, E, F, and G — are going to sit in seven chairs in a row. Child A has to sit next to bot

Seven children — A, B, C, D, E, F, and G — are going to sit in seven chairs in a row. Child A has to sit next to both B & G, with these two children immediately adjacent to her on either side. The other four children can sit in any order in any of the remaining seats. How many possible configuratio...


Re: If \(x\) and \(y\) are positive integers, what is the value of \(xy?\)

If \(x\) and \(y\) are positive integers, what is the value of \(xy?\) (1) The greatest common factor of \(x\) and \(y\) is \(10.\) (2) The least common multiple of \(x\) and \(y\) is \(180.\) Answer: C Source: GMAT Prep Target question : What is the value of xy? Statement 1 : The greatest common f...