GMAT Prep DS num props with hundreths

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Source: — Data Sufficiency |

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by sasi78 » Sun Jun 08, 2008 6:36 am
as per quesiton, say the number d=0.abc

stmt 1: 10th digit of 10d is 7. So 10*d = a.bc and c=7. So C>5.
Stmt 2: 1000th digit of d/10 is 7. So d/10 = 0.0abc. This yields c=7. Agian C>5.

Hence, the answer is D. Either stmt is sufficient.