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an educated guess

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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]
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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)
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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)
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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.
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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.
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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.
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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
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