GMAT Prep - Decimals

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GMAT Prep - Decimals

by rosh26 » Mon Sep 08, 2008 4:47 pm
Please explain
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by sumithshah » Mon Sep 08, 2008 8:02 pm
Let the number be X.ABCD

We know value of C respectively from A and B - but not value of B
Last edited by sumithshah on Wed Sep 10, 2008 8:38 am, edited 1 time in total.

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by Fab » Wed Sep 10, 2008 8:26 am
Could someone elaborate more please..?

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by sumithshah » Wed Sep 10, 2008 8:37 am
Sure.

Here is how it can be done.

Let the number is YX.ABCDE

What you need to find is B ( A is the tenths digit, X is the units digit, Y is the tens unit, B is the hundredths digit)

For statement 1 :

Tenths digit of 100Z = 2 ; 100Z = YXAB.CDE . Tenths digit of this is 2. Which means, C is 2

Hence insufficient

From statement 2 :
Units digit of 1000Z = 2 ; 1000Z = YXABC.DE . Units digit of this is 2. Which means, C is 2

Hence insufficient


Since Statement 1 and 2 say the same thing E