Section II Q 13

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agatka16: Newbie | Next Rank: 10 Posts; Posts: 5; Joined: Tue May 20, 2008 8:05 am

Section II Q 13

by agatka16 » Wed May 21, 2008 8:59 am

10^3 is how many times (0.01)^3?

a)10^6
b)10^8
c)10^9
d)10^12
e)10^18

I really don't know what they are asking for in this question.

Please help. Thanks.

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Source: Beat The GMAT — Problem Solving | Wed May 21, 2008 8:59 am

AleksandrM: Legendary Member; Posts: 566; Joined: Fri Jan 04, 2008 11:01 am; Location: Philadelphia; Thanked: 31 times; GMAT Score:640

by AleksandrM » Wed May 21, 2008 9:40 am

Is it b?

10^3 = 1000 and .01^3 = .000001 [remember this simple rule, when you are multiplying decimals, your answer has to have the total decimal points from all of the numbers multiplied. So, here you have 2 decimal places and you are multiplying them 3 times, 2 * 3 = 6 decimal places to the left.]

1000/.000001 = 1,000,000,000 or 10^8 [in the denominator move the decimal places over to the right until you have 1. As always, do to the numerator what you do to the denominator. Since you moved 6 decimal places over in the D, do the same in the N and you will end up with 1,000,000,000/1 which is just 1,000,000,000].

Hope I am right.

Last edited by AleksandrM on Wed May 21, 2008 9:44 am, edited 1 time in total.

https://second-lap.blocked/

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m51v50: Junior | Next Rank: 30 Posts; Posts: 26; Joined: Thu May 15, 2008 1:02 am; Thanked: 1 times

by m51v50 » Wed May 21, 2008 9:43 am

Solution:
10^3 = 1000
0.01^3=0.000001
1000/0.000001 =1000×1000000=10^3×10^6 =10^9.

Have 790 or die

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AleksandrM: Legendary Member; Posts: 566; Joined: Fri Jan 04, 2008 11:01 am; Location: Philadelphia; Thanked: 31 times; GMAT Score:640