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What is the tens digit of the no r? 1) The tens digit of

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What is the tens digit of the no r? 1) The tens digit of [#permalink] New post 25 Oct 2011, 23:22
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

81% (01:58) correct 18% (00:00) wrong based on 11 sessions
What is the tens digit of the no r?

1) The tens digit of r/10 is 3

2) The hundresds digit of 10r is 6

Can anyone explain?
[Reveal] Spoiler: OA

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Re: tens digit of a number [#permalink] New post 26 Oct 2011, 02:12
let digit be d

1.

Tens digit of r/10 is 3 means that digit in hundreds place of r is 3.
e.g. let r= 10,300. r/10=1030. but 3 is digit in hundreds place for r.
Insufficient

2.
Hundreds digit of 10r is 6 means that digit in tens place of r is 6.
e.g. let r= 1060. 10r=10600. 6 is tens digit in r but hundreds digit in 10r.
Sufficient
B
Re: tens digit of a number   [#permalink] 26 Oct 2011, 02:12
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What is the tens digit of the no r? 1) The tens digit of

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