It is currently 19 Nov 2017, 00:10

### 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If the area of square S is 20 square centimeters, which of the followi

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 42249

Kudos [?]: 132643 [0], given: 12326

If the area of square S is 20 square centimeters, which of the followi [#permalink]

### Show Tags

19 Sep 2017, 23:39
Expert's post
1
This post was
BOOKMARKED
00:00

Difficulty:

(N/A)

Question Stats:

79% (00:30) correct 21% (00:27) wrong based on 23 sessions

### HideShow timer Statistics

If the area of square S is 20 square centimeters, which of the following is closest to the length, in centimeters, of one side of S?

(A) 3.5
(B) 4.0
(C) 4.5
(D) 5.0
(E) 5.5
[Reveal] Spoiler: OA

_________________

Kudos [?]: 132643 [0], given: 12326

Manager
Joined: 18 Nov 2009
Posts: 65

Kudos [?]: 10 [0], given: 64

If the area of square S is 20 square centimeters, which of the followi [#permalink]

### Show Tags

20 Sep 2017, 00:13
Sqrt of 20 which approximates to 2 x Sqrt of 5 and then I was stuck approximating Sqrt of 5.
I tried 50 =approx = 49 = 7x7 just to realise that it does not help given that there is only one 0 in 50.
So I approximated sqrt of 500 to 22 which implies sqrt of 5 is around 2.2.
So 2x2.2 =approx 4.4. Ans C?

But I could have been cleverer by realising that the answer being 2 x sqrt of 5 and hesitating between C and D, answer D leads to sqrt of 5 = 2.5 which cannot be true given that 25x25=625 and 625 is way greater than 500. By elimination then ans C?

Kudos [?]: 10 [0], given: 64

Senior Manager
Status: Preparing for GMAT
Joined: 25 Nov 2015
Posts: 330

Kudos [?]: 105 [0], given: 320

Location: India
GPA: 3.64
Re: If the area of square S is 20 square centimeters, which of the followi [#permalink]

### Show Tags

20 Sep 2017, 11:20
Bunuel wrote:
If the area of square S is 20 square centimeters, which of the following is closest to the length, in centimeters, of one side of S?

(A) 3.5
(B) 4.0
(C) 4.5
(D) 5.0
(E) 5.5

Area of square = $$side^2$$ = 20
Side = $$\sqrt{20}$$
$$\sqrt{20}$$ must be between 4 and 5 since $$4^2$$=16 and $$5^2$$=25

Please press kudos, if u liked my post!
_________________

Please give kudos, if you like my post

When the going gets tough, the tough gets going...

Kudos [?]: 105 [0], given: 320

Re: If the area of square S is 20 square centimeters, which of the followi   [#permalink] 20 Sep 2017, 11:20
Display posts from previous: Sort by