Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Dec 1310:00 AM EST
-12:00 PM EST
Have you ever wondered how to score a PERFECT 805 on the GMAT? Meet Julia, a banking professional who used the Target Test Prep course to achieve this incredible feat. Julia's story is nothing short of an inspiration.
Dec 1207:30 AM PST
-08:30 AM PST
Join the conversation to learn more about INSEAD vs LBS
Dec 1410:00 AM EST
-12:00 PM EST
Think a 100% GMAT Verbal score is out of your reach? Target Test Prep will make you think again! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.
Dec 1411:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- Dec 15
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. - Dec 16
08:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes! - Dec 17
09:00 AM PST
-10:00 AM PST
Join Manhattan Prep instructor Whitney Garner for a fun—and thorough—review of logic-based (non-math) problems, with a particular emphasis on Data Sufficiency and Two-Parts. - Dec 18
10:00 AM PST
-11:00 AM PST
Here is the essential guide to securing scholarships as an MBA student! In this video, we explore the various types of scholarships available, including need-based and merit-based options.
03 Apr 2017, 00:35
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
75% (00:44) correct
25%
(00:49)
wrong
based on 83
sessions
History
Date
Time
Result
Not Attempted Yet
The circle above has 5 points on its edge. How many different quadrilaterals can be drawn that use four of these points as its vertices?
A. 120
B. 24
C. 20
D. 5
E. 4
A. 120
B. 24
C. 20
D. 5
E. 4
Good Question +1
Option D
Q. states how many quad.s can be formed using given 5 points on a circle a.k.a. Non-collinear points.
4 points can be chosen out of 5 points in 5C4 ways = 5 ways.
PS - Once 4 points are chosen, one draw multiple shapes using them, i.e., closed structures or just lines passing through all 4 points. But, for every chosen set of 4 points there can be only one UNIQUE quad., as order of points while drawing a quad. doesn't matter.
Hence, in total 5 quad.s can be drawn.
Option D
Q. states how many quad.s can be formed using given 5 points on a circle a.k.a. Non-collinear points.
4 points can be chosen out of 5 points in 5C4 ways = 5 ways.
PS - Once 4 points are chosen, one draw multiple shapes using them, i.e., closed structures or just lines passing through all 4 points. But, for every chosen set of 4 points there can be only one UNIQUE quad., as order of points while drawing a quad. doesn't matter.
Hence, in total 5 quad.s can be drawn.
03 Apr 2017, 07:58
Kudos
Bookmarks
Bunuel
The circle above has 5 points on its edge. How many different quadrilaterals can be drawn that use four of these points as its vertices?
A. 120
B. 24
C. 20
D. 5
E. 4
A. 120
B. 24
C. 20
D. 5
E. 4
Slightly different approach:
IMPORTANT: Connecting any 4 points will create a unique quadrilateral.
So, the question really comes down to "In how many different ways can we select 4 of the 5 points?"
From here, one approach is to calculate 5C4 (as RR88 did)
Another approach is to recognize that, if we select 1 point and REMOVE IT, then we are left with 4 points, which can be connected to create a unique quadrilateral.
So, in how many different ways can we select 1 point to REMOVE?
There are 5 points, so there are 5 ways to select 1 point.
Answer:
Cheers,
Brent
