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If N is a positive integer, is 10^n - 1 divisible by q? 1. Q

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CEO
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If N is a positive integer, is 10^n - 1 divisible by q? 1. Q [#permalink] New post 21 Nov 2007, 02:04
If N is a positive integer, is 10^n - 1 divisible by q?

1. Q is not divisible by either 5 or 2
2. Q is not divisible by 9
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 [#permalink] New post 21 Nov 2007, 02:31
Take some numbers: N=2 Q=11 (yes), Q=3 (no). All numbers satisfy both conditions - probably, the right answer is E
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 [#permalink] New post 21 Nov 2007, 02:35
In any case q could be 1 - in which case the answer will always be yes regardless of N...

Answer E.
  [#permalink] 21 Nov 2007, 02:35
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If N is a positive integer, is 10^n - 1 divisible by q? 1. Q

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