GMAT Prep 2 - number properties

caramel3536 · Posted: Fri May 09, 2008 3:09 pm Post subject: GMAT Prep 2 - number properties

Is the hundredths digit of the decimal d greater than 5?
(1) The tenths didit of 10d is 7
(2) The thousandths digit of d/10 is 7.

I'm totally lost on this one please help.

ans (d)

amitansu · Posted: Sat May 10, 2008 2:07 am Post subject:

Assume d=x.abc
hundredth digit of decimal here is 'b'.

1: 10th digit of "10d=xa.bc " is "b" given 7

which is also 100th digit of d.sufficient

1: 1000th digit of d/10=0.xabc is "b"; given 7, so sufficient

caramel3536 · Posted: Sun May 11, 2008 2:18 pm Post subject: ...........................

Thanks