Finite number of nonzero digits.

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Finite number of nonzero digits.

by matteomasciotti » Thu Nov 22, 2012 2:21 am
Hi everybody,
Since I am not a native english speaker I sometimes find hard to really figure out what a question is asking me. For instance, let's take Data Sufficiency #80 in the OG13.:

If r and s are positive integers, can the fraction r/s be expressed as a decimal with only a finite number of nonzero digits?
1) s is a factor of 100
2)r is a factor of 100

In my mind I assumed that a decimal with only a finite number of nonzero digit would look something like this : 0.45 or 0.3
But I am not sure about it because the solution at the end shows number like 0.20 0.04 or 0.02 , they all look like decimal with finite number, but shouldn't they be nonzero too?
Source: — Data Sufficiency |

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by Jim@StratusPrep » Thu Nov 22, 2012 11:13 am
No, you can have zeros. This language just means the decimal is not repeating, like 1/3 when converted to a decimal.
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by soni_pallavi » Fri Nov 23, 2012 12:41 am
Is the answer A ?

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by matteomasciotti » Fri Nov 23, 2012 5:27 am
Thanks for the reply;
yes the above answer is right.

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by sana.noor » Wed May 22, 2013 12:00 am
if the denominator has 2, 5 or both then the fraction r/s will terminate fully. Statement 1 says that the s has two factors 2 and 5 so it is sufficient
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