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What is the value of the tenths digit of number x?

(1) The hundredths digit of x is 5 (2) Number x, rounded to the nearest tenth, is 54.5

Obviously (1) alone is not enough, so is BCE What is about information (2) rounded to the nearest tenth, is 54,5 So the number no rounded is 54,49X where X integer > 4 or 54,50X where X integer <5 So the the tenth digit can be 4 or 5, the information (2) alone is not enough to answer to this question. However since in the 1st information the undredths digit of x is 5, so the tenth digit is 4 Therefore the correct answer is C

Need a quick clarification on this. (I guess I don't need a clarification anymore, just thought i'd add the note below)

What is Number x, rounded to the nearest tenth here?

if x = 54.550000 ~ 54.6 if x = 54.458000 ~ 54.5

I guess I figured it out as I was typing this itself.

Note: When the digit 5, 6, 7, 8, or 9 appears in the ones place, round up; when the digit 0, 1, 2, 3, or 4 appears in the ones place, round down
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Re: What is the value of the tenths digit of number x? [#permalink]

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18 Aug 2015, 23:53

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Re: What is the value of the tenths digit of number x? [#permalink]

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15 Oct 2015, 18:05

zahraf wrote:

What is the value of the tenths digit of number x?

(1) The hundredths digit of x is 5 (2) Number x, rounded to the nearest tenth, is 54.5

is this question asking about tenth digit or decimal point? i think it should be tenth decimal point, and after rounding off it comes as 54.5 hence tenth decimal 0.5 remained as it is as hundredth digit was less than or equal to 5, e.g number was 54.55, I round it off , it becomes 54.5, if the number was 54.56, i round it off it becomes 54.6

if you dont consider first statement then there are two possibilities 54.47 will also become 54.5 and 54.52 will also become 54.5 hence we need both statements

Hope i m making sense
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Re: What is the value of the tenths digit of number x? [#permalink]

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15 Oct 2015, 19:15

zahraf wrote:

What is the value of the tenths digit of number x?

(1) The hundredths digit of x is 5 (2) Number x, rounded to the nearest tenth, is 54.5

we have to find tenths digit of a number x

(1) hundredths digit 0f x is 5 we can not find tenths digit from it, hence insufficient

(2) Number x, rounded to the nearest tenth, is 54.5[/quote] here, we have two cases, if no is 54.50 to 54.54 then tenths digit is 5 and if no is 54.45 to 54.49 then tenths digit is 4 therefore (2) alone is not sufficient

using (1) and (2) together we clearly have no as 54.45, giving us tenths digit as 4 both statements together gives a unique answer

Answer C

Kudos, if you like the explanation

gmatclubot

Re: What is the value of the tenths digit of number x?
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15 Oct 2015, 19:15

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