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Quantitative Ability Preparation for GMAT

(212 Posts)

This thread is dedicated to preparation for Quantitative Ability section of GMAT. You may share questions related to topics like Arithmetic, Algebra, Geometry & Measurement, Statistics, Modern Mathematics, Data Sufficiency etc.

Question should not exceed 100 characters.Use add options for multiple choice questions and "Uploadimage/Add related data" for passage text papers.
Question should be at least 10 characters long.
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Ankit Kumar
Shared from Algebra - 1 on 03 Feb, 2019 9:37 PM

In a two-digit number, the sum of the digits a and b equals one-fourth the number minus nine. If a is twice of b, what is the value of b?

 
2
4
5
6
8
Please type your answer before submitting.
Ankit Kumar
Posted on 03 Feb, 2019 9:37 PM

Why did you choose the number as 10a b ? If we take the two digit number as 10b a, we can never get the answer . It seems the question is not correct .

Gmat
Shared from Permutation and Combination on 07 Sep, 2018 4:30 PM

A company that ships boxes to a total of 12 distribution centres uses colour coding to identify each centre. If either a single colour or a pair of two different colours is chosen to represent a centre uniquely, what is the minimum number of colours needed for the coding? (Assume that the order of the colours in a pair does not matter.)

 
4
5
6
12
None of these
Please type your answer before submitting.
Gmat
Posted on 07 Sep, 2018 4:30 PM

Not Able to understand this solution plz explain

Ankit Shai
Shared from GMAT Mock Test - 1 on 09 Aug, 2018 9:17 PM

There are two identical circular parks touching each other in the form of an eight. Both the parks have an area of 15,400 sq.m each. What should be the minimum area that has to be occupied at the boundary to make a big circular park, which covers these two circular parks?

 
15,400 sq.m
30,800 sq.m
46,200 sq.m
61,600 sq.m
77,000 sq.m
Please type your answer before submitting.
Ankit Shai
Posted on 09 Aug, 2018 9:17 PM

The phrasing of the question is very misleading. It seems that the question is asking the total area of the new circle whereas if actually should say "extra area beyond the 2 circular parks"

Gmat
Shared from Time & Distance on 07 Aug, 2018 8:07 PM

Two men are running in the same direction along a circle. They meet for the first time at a point diametrically opposite the starting point when the faster one is in his fifth round and slower one is in his fourth round. Find the ratio of their speeds.

 
4 : 5
7 : 9
6 : 5
2 : 3
9 : 7
Please type your answer before submitting.
Gmat
Posted on 07 Aug, 2018 8:07 PM

Not able to understand how 4.5d and 3.5d has been calculated

Parth Channiyara
Shared from Data Sufficiency on 24 Jul, 2018 5:28 PM

Directions: This data sufficiency problem consists of a question and two statements labeled (1) and (2). You have to decide whether the data given in the statements are sufficient for answering the question.

A mixture of ground meat consists of veal and beef. What is the cost, in dollars, per pound of the mixture?

(1)        The mixture consists of 2 pounds of veal and 5 pounds of beef.

(2)        Veal costs x dollars per pound and beef costs y dollars per pound.

 
Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
Both statements (1) and (2) together are sufficient, but neither statement alone is sufficient.
Each statement alone is sufficient.
Statements (1) and (2) together are not sufficient.
Please type your answer before submitting.
Parth Channiyara
Posted on 24 Jul, 2018 5:28 PM

How can any one explaiin??