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Re: There are two types of rolls on a counter, plain rolls and seeded rolls. What is the total number of rolls on the

There are two types of rolls on a counter, plain rolls and seeded rolls. What is the total number of rolls on the counter? (1) The ratio of the number of seeded rolls on the counter to the number of plain rolls on the counter Is 1 to 5. (2) There are 16 more plain rolls than seeded rolls on the cou...


Re: In a sequence 1, 2, 4, 8, 16, 32, ... each term after the first is twice the previous term. What is the sum of...

GMAT Prep In a sequence 1, 2, 4, 8, 16, 32, ... each term after the first is twice the previous term. What is the sum of the 16th, 17th and 18th terms in the sequence ? A. \(2^{18}\) B. \(3\cdot 2^{17}\) C. \(7\cdot 2^{16}\) D. \(3\cdot 2^{16}\) E. \(7\cdot 2^{15}\) OA E First notice the PATTERN : ...


Re: In the xy-coordinate system, if (a, b) and (a+3, b+k) are two points on the line defined by the equation x=3y-7...

Source: Official Guide In the xy-coordinate system, if (a, b) and (a+3, b+k) are two points on the line defined by the equation x=3y-7, then k=? A. 9 B. 3 C. 7/3 D. 1 E. 1/3 The OA is D Key Concept: If a point lies ON a line, then the coordinates (x and y) of that point must SATISFY the equation of...


Re: What is the value of positive integer x?

What is the value of positive integer x? (1) x^w=1 (2) w is even Answer: E Source: Veritas Prep Target question : What is the value of positive integer x? Statement 1 : x^w=1 This statement doesn't FEEL sufficient, so I'll TEST some values. There are several values of x and w that satisfy statement...

by Brent@GMATPrepNow

Sun Oct 11, 2020 5:10 am
Forum: Data Sufficiency
Topic: What is the value of positive integer x?
Replies: 1
Views: 51

Re: Is x less than 20?

Is x less than 20? (1) The sum of x and y is less than 20. (2) y is less than 20. Answer: e Source: official guide Target question : Is x less than 20? When I scan the two statements, I can quickly see that neither statement alone is sufficient. So let's jump straight to.... . . . Statements 1 and ...

by Brent@GMATPrepNow

Sun Oct 11, 2020 5:09 am
Forum: Data Sufficiency
Topic: Is x less than 20?
Replies: 1
Views: 54

Re: If cx - bx^3 = 0 where b and c are non-zero numbers, what is the value of b - c ?

If cx - bx^3 = 0 where b and c are non-zero numbers, what is the value of b - c ? (1) cx = c (2) bx = b Answer: D Source: 800 score Given : cx - bx³ = 0 Target question : What is the value of b - c ? Statement 1 : cx = c Since we know that c ≠ 0, we can safely divide both sides of the equation by c...


Re: Which of the following integers can be written as both the sum of 5 consecutive odd integers and 7 consecutive odd i

Which of the following integers can be written as both the sum of 5 consecutive odd integers and 7 consecutive odd integers? A. 49 B. 70 C. 140 D. 215 E. 525 Answer: E Source: Princeton Review We have consecutive odd integers, and each value is 2 greater than the value before it So for example, if ...


Re: Working alone, R can complete a certain kind of job in 9 hours. R and S

Working alone, R can complete a certain kind of job in 9 hours. R and S, working together at their respective rates, can complete one of these jobs in 6 hours. In how many hours can S, working alone, complete one of these jobs? (A) 18 (B) 12 (C) 9 (D) 6 (E) 3 Answer: A Source: official guide One ap...


Re: Each of the 45 books on a shelf is written either in English or in Spanish, and

Each of the 45 books on a shelf is written either in English or in Spanish, and each of the books is either a hardcover book or a paperback. If a book is to be selected at random from the books on the shelf, is the probability less than 1/2 that the book selected will be a paperback written in Span...


Re: What is the value of xy - yz?

What is the value of xy - yz? (1) y = 2 (2) x - z = 5 Answer: C Source: Official guide Important: Notice that we can take xy - yz and factor out the y to get the following equivalent expression: y(x - z) Target question : What is the value of y(x - z)? Statement 1 : y = 2 Our goal is to determine t...

by Brent@GMATPrepNow

Sat Oct 10, 2020 7:18 am
Forum: Data Sufficiency
Topic: What is the value of xy - yz?
Replies: 2
Views: 66

Re: Is the positive integer p a prime number?

Is the positive integer p a prime number? (1) p is odd. (2) 2 < p < 17 Answer: E Source: Official guide Target question : Is the positive integer p a prime number? Statement 1 : p is odd. There are several values of p that satisfy statement 1. Here are two: Case a : p = 3, in which case the answer ...

by Brent@GMATPrepNow

Sat Oct 10, 2020 7:18 am
Forum: Data Sufficiency
Topic: Is the positive integer p a prime number?
Replies: 1
Views: 34

Re: If 45% of z is 120% of y and y is 75% of x, what percent of x is z?

If 45% of z is 120% of y and y is 75% of x, what percent of x is z? A. 200 B. 160 C. 100 D. 65 E. 50 Answer: a Source Cole and Princeton Review One approach is to find values that satisfy the given information . y is 75% of x So it could it be the case x = 400 and y = 300 45% of z is (equals) 120% ...


Re: When 12 marbles are added to a rectangular aquarium, the water

When 12 marbles are added to a rectangular aquarium, the water in the aquarium rises 1 1/2 inches. In total, how many marbles must be added to the aquarium to raise the water 2 3/4 inches? A. 16 B. 18 C. 20 D. 22 E. 24 Answer: D Source: Magoosh We can solve this question using equivalent ratios We'...


Re: A certain toy store sold 20 toys yesterday, each of which was either a $40 toy or a $20 toy. How many $20 toys did t

A certain toy store sold 20 toys yesterday, each of which was either a $40 toy or a $20 toy. How many $20 toys did the toy store sell? 1) The average price of the toys sold yesterday was $35. (2) The total price of the 20 toys sold yesterday was between $650 and $750. Answer: A Source: GMAT hacks G...


Re: If z is a positive integer, is z + 1 a factor of 105?

If z is a positive integer, is z + 1 a factor of 105? (1) z is a factor of 20. (2) 10 is a factor of z. Answer: E Source: Kaplan Given : z is a positive integer Target question : Is z + 1 a factor of 105? Statement 1 : z is a factor of 20 So, z COULD equal 1,2, 4, 5, 10, or 20 Case a : If z = 4, th...

by Brent@GMATPrepNow

Fri Oct 09, 2020 10:16 am
Forum: Data Sufficiency
Topic: If z is a positive integer, is z + 1 a factor of 105?
Replies: 1
Views: 30