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# What is the tens digit of the positive integer r? 1. the

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VP
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What is the tens digit of the positive integer r? 1. the [#permalink]

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13 Jan 2008, 08:30
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What is the tens digit of the positive integer r?

1. the tens digit of r/10 is 3
2. the hundreds digitof 10r is 6
SVP
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13 Jan 2008, 10:26
B

Stat 1 tells us that 3 is the hundreds digits of r. Tens digit can be anything. insuff.

Stat 2 tells us that for 10r, 6 is the hundreds digit. Therefore, for r, 6 must be the tens digit. Sufficient.
VP
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13 Jan 2008, 10:35
pmenon wrote:
B

Stat 1 tells us that 3 is the hundreds digits of r. Tens digit can be anything. insuff.

Stat 2 tells us that for 10r, 6 is the hundreds digit. Therefore, for r, 6 must be the tens digit. Sufficient.

yes man, I sometimes get confused with this type of digit question. when you see one of them, please let me know.
Re: integer digits   [#permalink] 13 Jan 2008, 10:35
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