BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

an educated guess

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

an educated guess

by sanju09 » Mon Sep 06, 2010 11:56 pm
There are 2.54 centimeters in one inch. Which of the following is an educated guess for 140 centimeters in inches?
(A) 48
(B) 56
(C) 62
(D) 68
(E) 70

Source: [email protected]
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Source: — Problem Solving |
User avatar
Master | Next Rank: 500 Posts
Posts: 324
Joined: Mon Jul 05, 2010 6:44 am
Location: London
Thanked: 70 times
Followed by:3 members

by kmittal82 » Tue Sep 07, 2010 12:28 am
2.54 is appx. 5/2

2.54 cm = 1 inch

1cm = 1/2.54 = 2/5 inches

140 cm = 140 x 2 / 5 = 56

(B)
Top
User avatar
Newbie | Next Rank: 10 Posts
Posts: 8
Joined: Tue Sep 07, 2010 1:02 am
Location: India
GMAT Score:700

by baiju09 » Tue Sep 07, 2010 1:06 am
good answer, but what do they mean by an educated guess here?

thanks in advance

baiju09
kmittal82 wrote:2.54 is appx. 5/2

2.54 cm = 1 inch

1cm = 1/2.54 = 2/5 inches

140 cm = 140 x 2 / 5 = 56

(B)
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 324
Joined: Mon Jul 05, 2010 6:44 am
Location: London
Thanked: 70 times
Followed by:3 members

by kmittal82 » Tue Sep 07, 2010 1:12 am
baiju09 wrote:good answer, but what do they mean by an educated guess here?

thanks in advance

baiju09
kmittal82 wrote:2.54 is appx. 5/2

2.54 cm = 1 inch

1cm = 1/2.54 = 2/5 inches

140 cm = 140 x 2 / 5 = 56

(B)
Educated guess in this context means an approximation.

As the two words suggest, an educated guess is a guess based on the some facts or hard evidence you already have, rather than picking numbers at random.
Top
User avatar
Newbie | Next Rank: 10 Posts
Posts: 8
Joined: Tue Sep 07, 2010 1:02 am
Location: India
GMAT Score:700

by baiju09 » Tue Sep 07, 2010 1:16 am
why do we need pick numbers in this question ever?
kmittal82 wrote:
baiju09 wrote:good answer, but what do they mean by an educated guess here?

thanks in advance

baiju09


kmittal82 wrote:2.54 is appx. 5/2

2.54 cm = 1 inch

1cm = 1/2.54 = 2/5 inches

140 cm = 140 x 2 / 5 = 56

(B)
Educated guess in this context means an approximation.

As the two words suggest, an educated guess is a guess based on the some facts or hard evidence you already have, rather than picking numbers at random.
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 324
Joined: Mon Jul 05, 2010 6:44 am
Location: London
Thanked: 70 times
Followed by:3 members

by kmittal82 » Tue Sep 07, 2010 1:47 am
baiju09 wrote:why do we need pick numbers in this question ever?
kmittal82 wrote:
baiju09 wrote:good answer, but what do they mean by an educated guess here?

thanks in advance

baiju09


kmittal82 wrote:2.54 is appx. 5/2

2.54 cm = 1 inch

1cm = 1/2.54 = 2/5 inches

140 cm = 140 x 2 / 5 = 56

(B)
Educated guess in this context means an approximation.

As the two words suggest, an educated guess is a guess based on the some facts or hard evidence you already have, rather than picking numbers at random.
That statement I made is "general definition" of educated guess, not specific to this question.
Top
User avatar
Senior | Next Rank: 100 Posts
Posts: 98
Joined: Thu Aug 19, 2010 10:00 am
Thanked: 7 times
Followed by:1 members
GMAT Score:760

by scorpionz » Tue Sep 07, 2010 5:29 am
sanju09 wrote:There are 2.54 centimeters in one inch. Which of the following is an educated guess for 140 centimeters in inches?
(A) 48
(B) 56
(C) 62
(D) 68
(E) 70

Source: [email protected]
2.5 * 60 = 150

Hence C, D and E are out

2.5 * 4 = 10

Hence answer = 60 - 4 = 56 = B
Top
Post new topic Post Reply
• Page 1 of 1