It is currently 27 Jun 2017, 07:46

### 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
Your Progress

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

# Need help to solve this.

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Manager
Joined: 19 Sep 2010
Posts: 56
Location: Pune, India
Need help to solve this. [#permalink]

### Show Tags

14 Dec 2010, 07:39
Hi,

I'm not getting to solve this. 10^-5 - 10^-12 ??

I did this way;

lets assume 10^-5 =a
then, a-a^2/100. not getting the value of a. how else can we solve this?
Intern
Joined: 03 Jun 2009
Posts: 49
Re: Need help to solve this. [#permalink]

### Show Tags

14 Dec 2010, 08:23
SoniaSaini wrote:
Hi,

I'm not getting to solve this. 10^-5 - 10^-12 ??

I did this way;

lets assume 10^-5 =a
then, a-a^2/100. not getting the value of a. how else can we solve this?

one more way is...(10^-5 - 10^-12 )
Multiply and divide by 10^12
=> [10^12 (10^-5 - 10^-12 )]/10^12

=> (10^7 - 1) / 10^12
Math Expert
Joined: 02 Sep 2009
Posts: 39719
Re: Need help to solve this. [#permalink]

### Show Tags

14 Dec 2010, 08:30
SoniaSaini wrote:
Hi,

I'm not getting to solve this. 10^-5 - 10^-12 ??

I did this way;

lets assume 10^-5 =a
then, a-a^2/100. not getting the value of a. how else can we solve this?

For example like this:
$$10^{-5}-10^{-12}=\frac{1}{10^{5}}-\frac{1}{10^{12}}=\frac{10^7-1}{10^{12}}=\frac{10,000,000-1}{10^{12}}=\frac{9,999,999}{10^{12}}=\frac{9,999,999}{1,000,000,000,000}$$

$$\frac{9,999,999}{1,000,000,000,000}$$ can also be written as $$9.999999*10^{-6}$$ or as $$0.000009999999$$.

Hope it's clear.
_________________
Manager
Joined: 19 Sep 2010
Posts: 56
Location: Pune, India
Re: Need help to solve this. [#permalink]

### Show Tags

14 Dec 2010, 09:16
Thank you for your help.
It helped me.
Re: Need help to solve this.   [#permalink] 14 Dec 2010, 09:16
Similar topics Replies Last post
Similar
Topics:
1 CANT solve word problems. need alternative approach 2 14 Jun 2017, 09:59
1 Sum of Complex Series - Need Help Solving this question!! 1 19 Mar 2016, 04:21
1 quants question--Pls help solve? 1 17 Nov 2014, 10:56
1 Help me solve this 2 15 Oct 2011, 19:53
guys i need help in solving questions invoving percentile 4 15 Feb 2011, 23:17
Display posts from previous: Sort by

# Need help to solve this.

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.