GMATPrep CAT question (New Software)

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GMATPrep CAT question (New Software)

by myfish » Fri May 11, 2012 1:32 pm
A certain library assesses fines for overdue books as follows. On the first day the book is overdue, the total fine is $0.10. For each additional day that the book is overdue, the total fine is either increased by $0.30 or doubled, whichever results in the lesser amount. What is the total fine for a book on the fourth day it is overdue?

A) 0.60
B) 0.70
C) 0.80
D) 0.90
E) 1.00

I am aware of the fact that this is most likely a very easy question, however, I admit I am struggling with this one.
Source: — Problem Solving |

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by myfish » Fri May 11, 2012 1:46 pm
Just figured it out. This one is an amazing speed bump as you have to think this one through. OA is 0.70

DOUBLE +0.30
DAY 1: 0.10
DAY 2: 0.20 0.40
DAY 3: 0.40 0.50
DAY 4: 0.80 0.70