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# If (0.1)2 + x = 0.5, then x =

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Intern
Joined: 29 Mar 2018
Posts: 12
Location: United States
If (0.1)2 + x = 0.5, then x =  [#permalink]

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22 Apr 2019, 17:12
00:00

Difficulty:

5% (low)

Question Stats:

90% (00:45) correct 10% (00:39) wrong based on 21 sessions

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If (0.1)^2 + x = 0.5, then x =

(A) 0.010

(B) 0.040

(C) 0.490

(D) 0.501

(E) 0.510
VP
Status: Learning stage
Joined: 01 Oct 2017
Posts: 1006
WE: Supply Chain Management (Energy and Utilities)
Re: If (0.1)2 + x = 0.5, then x =  [#permalink]

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22 Apr 2019, 18:01
MYGMAT2019 wrote:
If (0.1)^2 + x = 0.5, then x =

(A) 0.010

(B) 0.040

(C) 0.490

(D) 0.501

(E) 0.510

Given, (0.1)^2 + x = 0.5
Or, 0.01+x=0.5
Or, x=0.5-0.01=0.490

Ans. (C)
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Regards,

PKN

Rise above the storm, you will find the sunshine
e-GMAT Representative
Joined: 04 Jan 2015
Posts: 2852
Re: If (0.1)2 + x = 0.5, then x =  [#permalink]

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23 Apr 2019, 00:24

Solution

Given:
• $$(0.1)^2 + x = 0.5$$

To find:
• The value of x

Approach and Working:
From the given equation, we can write
• $$(0.1)^2 + x = 0.5$$
Or, 0.010 + x = 0.500
Or, x = 0.500 – 0.010 = 0.490

Hence, the correct answer is option C.

_________________
Re: If (0.1)2 + x = 0.5, then x =   [#permalink] 23 Apr 2019, 00:24
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