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DeeptiM
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 12:21
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15% (low)

Question Stats:

77% (00:58) correct 23% (01:05) wrong based on 71 sessions

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whatz the tens digit of N?

1) 100N = 125.253
2) N rounded to the nearest thousandths is 1.253
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D
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LGOdream
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 13:09
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DeeptiM
whatz the tens digit of N?

1) 100N = 125.253
2) N rounded to the nearest thousandths is 1.253
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1) N = 01.2523

Tens digit: 0. Sufficient.

2) 01.253

The fact that the thousandths are rounded is irrelevant, as the rounding happens far away from the tens digit.

Tens digit: 0. Sufficient.

Answer D.

Strange question. Are you sure it didn't ask for the tenths?
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 14:01
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well what i hve state "tens"...

on second thoughts, we wldnt hve a stmt wid no reference to the ques..what if it's tenths?? wld it change the answer??
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 14:07
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DeeptiM
well what i hve state "tens"...

on second thoughts, we wldnt hve a stmt wid no reference to the ques..what if it's tenths?? wld it change the answer??
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Based on the above logic. What do you think? Should it change the answer?
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 14:28
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01.253 cld have been 1.15...rounded to nearest thousandths wld hve becum 1.2...is that the rite way to think?
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 14:41
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DeeptiM
01.253 cld have been 1.15...rounded to nearest thousandths wld hve becum 1.2...is that the rite way to think?
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I actually didn't get that. Anyway, when it says rounded to thousandths; there must be a max of 3 digits after the decimal, that's all.

whatz the tenths digit of N?

1) 100N = 125.253
2) N rounded to the nearest thousandths is 1.253

1)
100N=125.253
N=125.253/100=1.25253
We definitely know the tenth digit because we have the entire real number with us.

N=1.25253
2 is the tenth digit.
Sufficient.

2) N rounded to the nearest thousandths is 1.253

It means, N can be:
N=1.2533464646465464644
OR
N=1.2525768768768686867876

When it says rounded to thousandths digit, we should consider only two digits: thousandth digit AND ten-thousandth digit

If N=1.2534
Here,
3 is thousandths
4 is ten-thousandths

Since, 0<=4<=5; 3 in the thousandth place remains unchanged.

If N=1.2535
Here,
3 is thousandths
5 is ten-thousandths

Since, 5<=5<=9; 3 in the thousandth place increases by 1.
N rounded to thousandths place becomes 1.254

In either case, tenths place is untouched. We shouldn't have even think about it. Tenth place will remain 2, no matter what the thousandth place is rounded to.

Thus, tenth=2. Sufficient.

Ans: "D"
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 15:15
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DeeptiM
01.253 cld have been 1.15...rounded to nearest thousandths wld hve becum 1.2...is that the rite way to think?
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I'd recommend you to try to write english properly. I am not native and have problems understanding you, although it seems that fluke is having a hard time also. I think it is important not only as a matter of respect for people who has to understand you in order to help you but for yourself also; if you ever have to take the GMAT, better start practising proper grammar now.
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to Updated on: 28 Aug 2011, 21:23
Originally posted by DeeptiM on 28 Aug 2011, 21:15.
Last edited by DeeptiM on 28 Aug 2011, 21:23, edited 1 time in total.
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LGOdream
DeeptiM
01.253 cld have been 1.15...rounded to nearest thousandths wld hve becum 1.2...is that the rite way to think?

I'd recommend you to try to write english properly. I am not native and have problems understanding you, although it seems that fluke is having a hard time also. I think it is important not only as a matter of respect for people who has to understand you in order to help you but for yourself also; if you ever have to take the GMAT, better start practising proper grammar now.
Show more

Hi There, Thanks for your annotations, I couldnot help but smile at your verbiage :)

Nonetheless, I realised I have used "slangs" while reverting to the message which might have disturbed you a little. Going forward will ensure the statement is well written for the easy understanding.

Appreciate your valuable feedback.
Thanks.
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 28 Aug 2011, 21:22
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fluke
DeeptiM
01.253 cld have been 1.15...rounded to nearest thousandths wld hve becum 1.2...is that the rite way to think?

I actually didn't get that. Anyway, when it says rounded to thousandths; there must be a max of 3 digits after the decimal, that's all.

whatz the tenths digit of N?

1) 100N = 125.253
2) N rounded to the nearest thousandths is 1.253

1)
100N=125.253
N=125.253/100=1.25253
We definitely know the tenth digit because we have the entire real number with us.

N=1.25253
2 is the tenth digit.
Sufficient.

2) N rounded to the nearest thousandths is 1.253

It means, N can be:
N=1.2533464646465464644
OR
N=1.2525768768768686867876

When it says rounded to thousandths digit, we should consider only two digits: thousandth digit AND ten-thousandth digit

If N=1.2534
Here,
3 is thousandths
4 is ten-thousandths

Since, 0<=4<=5; 3 in the thousandth place remains unchanged.

If N=1.2535
Here,
3 is thousandths
5 is ten-thousandths

Since, 5<=5<=9; 3 in the thousandth place increases by 1.
N rounded to thousandths place becomes 1.254

In either case, tenths place is untouched. We shouldn't have even think about it. Tenth place will remain 2, no matter what the thousandth place is rounded to.

Thus, tenth=2. Sufficient.

Ans: "D"
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Thank a lot Fluke..

+1 for the explanation..the way you explain is really helpful.
Thanks again!
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whatz the tens digit of N? 1) 100N = 125.253 2) N rounded to 18 Oct 2022, 17:37
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