prateek_guy2004 wrote:GMATGuruNY wrote:rppala90 wrote:What is tens digit of the positive integer r ?
(1) The tens digit of r /10 is 3.
(2) The hundreds digit of 10r is 6.
Statement 1: The tens digit of r/10 is 3.
Multiply by 10:
The (10*tens) digit of 10*(r/10) is 3.
The HUNDREDS digit of r is 3.
No way to determine the tens digit of r.
Insufficient.
Statement 2: The hundreds digit of 10r is 6.
Divide by 10:
The (hundreds/10) digit of (10r)/10 is 6.
The TENS digit of r is 6.
Sufficient.
The correct answer is
B.
why B...i cant not understand the calculation of statement 1 ....r/10=3 So if r is 30 3 is clearly tenth digit. Yes if you divide it by 10 then # is unit digit.....
I am clear with statement 2.
To me both the statements are sufficient D
As I noted in my post above, statement 1 indicates that the HUNDREDS digit of r is 3.
Statement 1: The tens digit of r/10 is 3.
It's possible that r=300, since the tens digit of 300/10 = 30 is 3.
The tens digit of r=300 is 0.
It's possible that r=310, since the tens digit of 310/10 = 31 is 3.
The tens digit of r=310 is 1.
The HUNDREDS digit of r is consistently 3, but the TENS digit of r can be different values.
Insufficient.
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