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Power and Roots

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by BTGmoderatorRO » Sat Nov 11, 2017 9:03 am
$$(1.00001)(0.99999)−(1.00002)(0.99998)$$

A. 0
B. $$10^{10}$$
C. $$3\left(10^{-10}\right)$$
D. $$10^{-5}$$
E. $$3\left(10^{-5}\right)$$
OA is c

What mathematical approach can i use to solve this question? can any expert me out.
Thanks
Last edited by BTGmoderatorRO on Sat Nov 11, 2017 9:14 am, edited 1 time in total.
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Power and Roots

by Brent@GMATPrepNow » Sat Nov 11, 2017 9:09 am
Roland2rule wrote:(1.00001)(0.99999)−(1.00002)(0.99998)=

A. 0

B. $$10^{10}$$

C. $$3\left(10^{-10}\right)$$

D. $$10^{-5}$$

E. $$3\left(10^{-5}\right)$$

OA is C

Pls can this question be solved directly on a calculator.I need urgent reply.Thanks
Here's a hint (similar question): https://www.beatthegmat.com/operations-o ... 77054.html

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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by BTGmoderatorRO » Sat Nov 11, 2017 9:41 am
Brent@GMATPrepNow wrote:
Roland2rule wrote:(1.00001)(0.99999)−(1.00002)(0.99998)=

A. 0

B. $$10^{10}$$

C. $$3\left(10^{-10}\right)$$

D. $$10^{-5}$$

E. $$3\left(10^{-5}\right)$$

OA is C

Pls can this question be solved directly on a calculator.I need urgent reply.Thanks
Here's a hint (similar question): https://www.beatthegmat.com/operations-o ... 77054.html

Cheers,
Brent
Thanks Brent
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by barksdale » Sat Nov 11, 2017 9:48 am
No calculators allowed on the GMAT though, right? <i class="em em-confused"></i>
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