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(3*10^20)(8*10^30) =

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1 KUDOS received
Senior Manager
Senior Manager
Joined: 20 May 2014
Posts: 282
Followers: 15

Kudos [?]: 49 [1] , given: 220

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(3*10^20)(8*10^30) = [#permalink] New post 20 Nov 2017, 11:29
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\((3*10^{20})(8*10^{30}) =\)

A. 2.4 × 10^50
B. 2.4 × 10^51
C. 2.4 × 10^60
D. 2.4 × 10^61
E. 2.4 × 10^301


Kudos for correct solution.
[Reveal] Spoiler: OA
Intern
Intern
Joined: 01 Sep 2017
Posts: 20
Followers: 0

Kudos [?]: 20 [0], given: 21

Re: (3*10^20)(8*10^30) = [#permalink] New post 24 Nov 2017, 07:11
Hi Bunuel!

I do not understand why the answer would be any of the displayed answers.

In my opinion it should be 2,4 * 10^49 because we get 24 * 10^50 which one would have to divise by 10... leading to 2,4 *10^49...


How did you solve this one?

thanks a lot
Senior Manager
Senior Manager
Joined: 20 May 2014
Posts: 282
Followers: 15

Kudos [?]: 49 [0], given: 220

CAT Tests
Re: (3*10^20)(8*10^30) = [#permalink] New post 26 Nov 2017, 09:01
Bunuel wrote:
\((3*10^{20})(8*10^{30}) =\)

A. 2.4 × 10^50
B. 2.4 × 10^51
C. 2.4 × 10^60
D. 2.4 × 10^61
E. 2.4 × 10^301


Kudos for correct solution.


\((3*10^{20})(8*10^{30}) =24*10^{50}=2.4*10^{51}\)

Answer: B.
Re: (3*10^20)(8*10^30) =   [#permalink] 26 Nov 2017, 09:01
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(3*10^20)(8*10^30) =

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