Search found 9 matches


Re: A tank containing water started to leak. Did the tank

here is my approach to this problem in detail. Hopefully this will be helpful. Please do let me know if you feel an alternate approach would be better via a comment on the video. The problem approach can be broken down into four steps: 1. Understanding that the Total Volume at the start = Volume rem...

by gmatbyexample

Tue Sep 07, 2021 3:01 am
Forum: Data Sufficiency
Topic: A tank containing water started to leak. Did the tank
Replies: 2
Views: 549

Re: If x + y + z > 0, is z > 1 ?

Great solution above.

I had prepared a YouTube video for the same in case you are looking for a visual:

https://youtu.be/km49QKnuyoo

by gmatbyexample

Tue Aug 17, 2021 12:10 pm
Forum: Data Sufficiency
Topic: If x + y + z > 0, is z > 1 ?
Replies: 2
Views: 348

Re: A merchant discounted the sale price of a coat and the sale price of a sweater. Which of the two articles of clothin

The important thing to understand in this kind of question is that the values you end up comparing are: C*d & (C+10)(d-2) The former being discount on coat and latter being discount on sweater expressed in terms of coat. If you look at the RHS, (C+10) factor is trying to bring the C*d multiplication...


Re: A grocer stacked oranges in a pile. The bottom layer was rectangular with 3 rows of 5 oranges each. In the second la

A grocer stacked oranges in a pile. The bottom layer was rectangular with 3 rows of 5 oranges each. In the second layer from the bottom, each orange rested on 4 oranges from the bottom layer, and in the third layer, each orange rested on 4 oranges from the second layer. Which of the following is th...


Re: \(q\) is a three-digit number, in which the hundreds digit is greater than the units digit, and the units digit is e

\(q\) is a three-digit number, in which the hundreds digit is greater than the units digit, and the units digit is equal to the tens digit. If \(10^{99}-q\) is divisible by \(9,\) then what is the number of possible values of \(q?\) A. 4 B. 5 C. 6 D. 9 E. 10 Answer: C Source: e-GMAT Good question. ...


Re: DOUBT IN MANHATTAN QUANT QUESTION

If x = (9b - 3ab)/(3/a - a/3), what is x? (1) 9ab/(3+a) = 18/5 (2) b = 1 This question is present in Manhattan guide 2 in chapter Strategy:Combos. It's official answer is A. However I have doubt in that. In the official Manhattan guide explanation the equation is reformed into 3a(3b)(3-a)/(3-a)(3+a...

by gmatbyexample

Mon Jul 12, 2021 12:01 pm
Forum: GMAT Math
Topic: DOUBT IN MANHATTAN QUANT QUESTION
Replies: 1
Views: 1973

Re: If x is a positive integer, what is the remainder when x is divided by 5?

The trick is to understand the units digit of x. We know that multiples of 5 have either 5 or 0 as units digit. So depending on the units digit of x, the remainder w.r.t 5 can be determined. a) x^2 leaves a remainder of 4. First, we need to ask, what could be the units digit of x^2? Case 1: If the c...


Re: In the given figure, BD = 6 and DC = 4. If angle BAD = \(30^o\) and angle ADC = \(120^o,\) find the area of the tria

In these kind of problems, I recommend redrawing the triangle after deriving some preliminary information. Two properties we will use here: 1) Angles on a line are supplementary (their sum is 180) 2) Sum of angles of the triangle is 180 Since Angle ADC is 120 => angle ADB = 60 (sum must be 180). Sin...


Re: Que: If both 7 and \(3^3\) are factors of \(p\cdot4^4\cdot6^2\cdot5^4\) , then what is the smallest.....

The first step would be to prime factorize p*(4^4)*(6^2)*(5^2) = p * 2^8 * (2^2 * 3^2) * 5^2 = p * 2^10 * 3^2 * 5^2 For both 7 and 3^3 to be factors of this number - there should be atleast one 7 (which p could fulfill) and three 3s - we already see that 3^2 is in the factors - which means one addit...