February 23, 2019 February 23, 2019 07:00 AM PST 09:00 AM PST Learn reading strategies that can help even nonvoracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT February 24, 2019 February 24, 2019 07:00 AM PST 09:00 AM PST Get personalized insights on how to achieve your Target Quant Score.
Author 
Message 
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 53066

Question Stats:
34% (00:56) correct 66% (01:10) wrong based on 247 sessions
HideShow timer Statistics



Math Expert
Joined: 02 Sep 2009
Posts: 53066

Re M0424
[#permalink]
Show Tags
15 Sep 2014, 23:23



Intern
Joined: 07 Jul 2014
Posts: 16

Re: M0424
[#permalink]
Show Tags
19 Oct 2014, 09:58
How do we know that BD is median to AC and not AB or BC?



Math Expert
Joined: 02 Sep 2009
Posts: 53066

Re: M0424
[#permalink]
Show Tags
20 Oct 2014, 02:51



Manager
Joined: 17 Jul 2013
Posts: 79

Re: M0424
[#permalink]
Show Tags
27 Dec 2014, 04:41
Bunuel wrote: Official Solution:
(1) ABC is an isosceles triangle. Clearly insufficient. (2) \(AC^2 = AB^2 + BC^2\). This statement implies that ABC is a right triangle and AC is its hypotenuse. Important property: median from right angle is half of the hypotenuse, hence BD=12=AC/2, from which we have that AC=24. Sufficient.
Answer: B Is there any other rule for relation between the triangles and median?



Math Expert
Joined: 02 Sep 2009
Posts: 53066

Re: M0424
[#permalink]
Show Tags
28 Dec 2014, 05:02



Manager
Joined: 07 Feb 2015
Posts: 64

Bunuel wrote: Official Solution: (1) ABC is an isosceles triangle. Clearly insufficient.
It is not clear to me how this is insufficient. If A=B=C and BD = 12 couldn't you find the other sides, x, (that are all equal to each other) with pythagorean's theorem? i.e. \(2x^2=12\)



Math Expert
Joined: 02 Sep 2009
Posts: 53066

Re: M0424
[#permalink]
Show Tags
23 Jul 2015, 03:42



Intern
Joined: 23 Jul 2015
Posts: 2

Re: M0424
[#permalink]
Show Tags
23 Jul 2015, 10:26
Newbie here; am I missing something or were there no multiple choice answers for the math question?
Thanks



Math Expert
Joined: 02 Sep 2009
Posts: 53066

Re: M0424
[#permalink]
Show Tags
23 Jul 2015, 10:29
RSK70 wrote: Newbie here; am I missing something or were there no multiple choice answers for the math question?
Thanks Hi, and welcome to GMAT Club. This is a data sufficiency question. Options for DS questions are always the same. The data sufficiency problem consists of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements, plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of the word counterclockwise), you must indicate whether— A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked. C. BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked. D. EACH statement ALONE is sufficient to answer the question asked. E. Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed. I suggest you to go through the following post ALL YOU NEED FOR QUANT. Hope this helps.
_________________
New to the Math Forum? Please read this: Ultimate GMAT Quantitative Megathread  All You Need for Quant  PLEASE READ AND FOLLOW: 12 Rules for Posting!!! Resources: GMAT Math Book  Triangles  Polygons  Coordinate Geometry  Factorials  Circles  Number Theory  Remainders; 8. Overlapping Sets  PDF of Math Book; 10. Remainders  GMAT Prep Software Analysis  SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS)  Tricky questions from previous years.
Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
What are GMAT Club Tests? Extrahard Quant Tests with Brilliant Analytics



Intern
Joined: 23 Jul 2015
Posts: 2

Re: M0424
[#permalink]
Show Tags
23 Jul 2015, 13:50
Thank you for that info! Appreciate the help and will do better to get acclimated to the rest of the forum.
MCAT down, GMAT to go



Intern
Joined: 30 May 2015
Posts: 42
WE: Analyst (Internet and New Media)

Re: M0424
[#permalink]
Show Tags
11 Jul 2016, 12:32
Hi, Towards the proof for the question, pls refer: https://www.algebra.com/algebra/homewor ... use.lessonrgds.



Intern
Joined: 02 Jun 2016
Posts: 4

Re: M0424
[#permalink]
Show Tags
24 Nov 2016, 18:17
I chose A as sufficent since 1 states ABC is an isosceles triangle and thus assuming Angle BAC and Angle BCA as 45. Thus using 454590 rule I was able to deduce that AC is 24. Not able to understand what was wrong with my logic.



Math Expert
Joined: 02 Sep 2009
Posts: 53066

Re: M0424
[#permalink]
Show Tags
24 Nov 2016, 23:16



Intern
Joined: 04 Aug 2014
Posts: 29
GMAT 1: 620 Q44 V31 GMAT 2: 620 Q47 V28
GPA: 3.2

Re: M0424
[#permalink]
Show Tags
28 Feb 2017, 23:51
BRUNEL I HAVE A DOUBT PERTAINING TO THE PROPERTY : MEDIAN IS HALF OF HYPOTNUSE IN A RIGHT ANGLE TRIANGLE
IS THIS PROPERTY APPLICABLE TO TALL THE RIGHT ANGLE TRIANGLE'S SUCH AS 30:60:90 / 454590 ETC
I HAVE APPLIED THIS PROPERTY TO ONE OF THE QUESTION IN CO ORDINATE GEOMETRY WHILE FINDING THE MEDIAN IN A RIGHT ANGLE TRIANGLE IN WHICH HYPOTNUSE WAS GIVEN BUT THE I WAS GETTING WAS INCORRECT...



Math Expert
Joined: 02 Sep 2009
Posts: 53066

Re: M0424
[#permalink]
Show Tags
01 Mar 2017, 00:27



Current Student
Joined: 27 Oct 2014
Posts: 156
Location: India
GPA: 4
WE: Consulting (Consulting)

Re: M0424
[#permalink]
Show Tags
01 Jul 2017, 10:24
How about we deduce (B) in this way. The median splits Angle B in halves of 45 degrees each while making an angle of 90 degrees on the hypot AC. So essentially we get two triangles of 459045 in which we know the hypot length. Rest should be easy with the special triangles property?
_________________
If you found this post useful, hit Kudos! :D



Senior Manager
Joined: 18 Jun 2016
Posts: 262
Location: India
GMAT 1: 720 Q50 V38 GMAT 2: 750 Q49 V42
GPA: 4
WE: General Management (Other)

gmat7m wrote: How about we deduce (B) in this way.
The median splits Angle B in halves of 45 degrees each while making an angle of 90 degrees on the hypot AC. So essentially we get two triangles of 459045 in which we know the hypot length. Rest should be easy with the special triangles property? This is only 1 special case of Isosceles Right Triangle while bunuel is talking about a general case. Hence, your explanations supports Option C while OA is B.
_________________
I'd appreciate learning about the grammatical errors in my posts
Please hit Kudos If my Solution helps
My Debrief for 750  https://gmatclub.com/forum/from720to750oneofthemostdifficultpleatuestoovercome246420.html
My CR notes  https://gmatclub.com/forum/patternsincrquestions243450.html



Intern
Joined: 21 May 2015
Posts: 15

Re M0424
[#permalink]
Show Tags
22 Aug 2017, 11:26
I think this is a highquality question and I agree with explanation.



Intern
Joined: 02 Oct 2017
Posts: 2
Location: United Kingdom
WE: Securities Sales and Trading (Investment Banking)

Re M0424
[#permalink]
Show Tags
03 Mar 2018, 13:05
I think this is a highquality question and I agree with explanation.







Go to page
1 2
Next
[ 24 posts ]



