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BTGmoderatorDC wrote:By what percent is 25 greater than 15?

(A) 10%
(B) 25%
(C) 33 1/3%
(D) 60%
(E) 66 2/3%

OA E

Source: Manhattan Prep
25/15 = 5/3 = 1.6666
So, 25 is greater than 15 by .666666 x100 %
= 66.66%

Answer E

by shashank.ism

Fri Jan 11, 2019 1:09 am
Forum: Problem Solving
Topic: By what percent is 25 greater than 15?
Replies: 5
Views: 1386

A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of the body weight, by what percent was the prescribed dosage greater than the typical dosage? A) 8% B) 9% C) 11% D) 12.5% E) 14.8% OA...

by shashank.ism

Fri Feb 10, 2017 4:41 am
Forum: Problem Solving
Topic: A doctor prescribed 18 cubic centimeters
Replies: 5
Views: 3964

If n is a multiple of 5, and n=(p^2)q where p and q are prime, which of the following must be a multiple of 25? A.p^2 B.q^2 C.pq D.(p^2)(q^2) E.(p^3)q OA: D Source:GMATPrep Hi GMATGuruNY / Rich, Can somebody explain this, using plugging method Thanks and Regards Nandish n is a multiple of 5 & n = p...

by shashank.ism

Fri Feb 10, 2017 3:22 am
Forum: Problem Solving
Topic: If n is a multiple of 5
Replies: 6
Views: 2643

The harvest yield from a certain apple orchard was 350 bushels of apples. If x of the trees in the orchard each yielded 10 bushel of apples, what fraction of the harvest yield was from these x trees? A) x/35 B) 1-(x/35) C) 10x D) 35-x E) 350-10x OA A Apple orchard was 350 bushels of apples. Also x ...

by shashank.ism

Fri Feb 10, 2017 3:13 am
Forum: Problem Solving
Topic: apple orchard was 350 bushels of apples
Replies: 6
Views: 2980

If y is an integer, then the least possible value of |23 - 5y| is A) 1 B) 2 C) 3 D) 4 E) 5 OA B |23-5y| is always greater than or equal to 0 -> hence 23-5y = 0 -> y = 23/5 = 4+3/5 so we can have minimum value at either y = 4 or 5 since 4<4+3/5 <5 At y = 4, |23-5y| = 3 At y = 5, |23-5y| = 2 So least...

by shashank.ism

Fri Feb 10, 2017 3:08 am
Forum: Problem Solving
Topic: least possible value of |23 - 5y|
Replies: 12
Views: 7734

Since m^2 is divisible by 48 & 48 = 2x2x2x2x3. Here we will take value which is in pair as single unit and value which is not in pair as single unit, as value which is not in pair must be in pair in the actual value of m^2 So largest positiive integer that must divide m is 2 x 2 x 3 = 12. Hence D. I...

by shashank.ism

Fri Feb 10, 2017 2:14 am
Forum: Problem Solving
Topic: If m is a positive integer and m^2 is d
Replies: 8
Views: 4667

Here's a 700+ level question I just created. If 3^k = 16, and 2^j = 27, then kj = A) 8 B) 9 C) 10 D) 12 D) 15 Answer: D 3^k = 16 Taking Log on both sides, -> k log3 = log 16 = 4 log2 -> k = 4 log2 /log3 ..................(i) similarly , 2^j = 27 -> j log2 = log 27 = 3 log3 -> j = 3 log3/log2 .........

by shashank.ism

Sat Feb 04, 2017 6:27 am
Forum: Problem Solving
Topic: If 3^k = 16, and 2^j = 27
Replies: 21
Views: 6849

Here's a 700-level question I just created. x and y are positive integers. If the greatest common divisor of x and 3y is 9, and the least common multiple of 3x and 9y is 81, then what is the value of 81xy? A) 3^5 B) 3^6 C) 3^7 D) 3^8 E) 3^9 Answer: D LCM of 3x and 9y is 81 = 3^4 hence LCM of x and ...

by shashank.ism

Sat Feb 04, 2017 6:22 am
Forum: Problem Solving
Topic: The greatest common divisor of x and 3y
Replies: 6
Views: 2481

Roberto has three children: two girls and a boy. All were born on the same date in different years. The sum of the ages of the two girls today is smaller than the age of the boy today, but a year from now the sum of the ages of the girls will equal the age of the boy. Three years from today, the di...

by shashank.ism

Mon Jan 16, 2017 5:51 am
Forum: Problem Solving
Topic: Three years from today..
Replies: 7
Views: 3081

At the rate of x feet per s seconds, how many miles does a cyclist travel in y minutes(5280 feet per mile)? a) xy/88s b) 88s/xy c) xy/5280s d) 5280s/xy e) 15xy/22s Please help me understand how to approach above conversion problems. Source is Veritas Prep Book on word problems. Speed = x/s feet/sec...

by shashank.ism

Mon Jan 16, 2017 5:40 am
Forum: Problem Solving
Topic: At the rate of x feet per s seconds, how many miles does a c
Replies: 10
Views: 4122

If an integer n is to be chosen at random from the integers 1 to 96, inclusive, what is the probability that n(n+1)(n+2) will be divisible by 8? A) 1/4 B) 3/8 C) 1/2 D) 5/8 E) 3/4 OA D First we try to analyse the expression, n(n+1)(n+2) Case1 : It is odd*even*odd In this case, the expression will b...

by shashank.ism

Sun Jan 15, 2017 9:53 am
Forum: Problem Solving
Topic: n(n+1)(n+2) will be divisible by 8
Replies: 5
Views: 2418

If an integer n is to be chosen at random from the integers 1 to 96, inclusive, what is the probability that n(n+1)(n+2) will be divisible by 8? A) 1/4 B) 3/8 C) 1/2 D) 5/8 E) 3/4 OA D Please explain First we try to analyse the expression, n(n+1)(n+2) Case1 : It is odd*even*odd In this case, the ex...

by shashank.ism

Sun Jan 15, 2017 9:45 am
Forum: Problem Solving
Topic: probability that n(n+1)(n+2) will be divisible by 8
Replies: 4
Views: 1841

Alternatively Mitch said very correctly that by checking out the provided options, we can easily figure out the correct answer. Option A , Option B not divisible by 2 Option C not divisible by 7 Option D not divisible by 4 Option is divisible by 1, 2, 3, .... , 7 so by looking at the options you can...

by shashank.ism

Thu Dec 20, 2012 3:51 am
Forum: Problem Solving
Topic: Stange Question on LCM
Replies: 6
Views: 910

From the question its clear that any no. of children from 1 to 7 can attend the party. And you have to bring smallest number cookies in such a way that each child receives the same number cookies. It is clear from the question that you have to find smallest number which is divisble by 1, 2, 3, ........

by shashank.ism

Thu Dec 20, 2012 3:47 am
Forum: Problem Solving
Topic: Stange Question on LCM
Replies: 6
Views: 910

Thanks for the posts. for one, i can convert single segment inequality to its absolute form. I could not do same for two segment inequalities (that is quadratic forms). this is similar to the OR (|x-a| > b) situation Is this knowledge necessary for the gmat test? Yup there is a Thanks button for th...

by shashank.ism

Sun Mar 04, 2012 2:15 am
Forum: Problem Solving
Topic: converting Inequality to absolute form
Replies: 5
Views: 701