BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Root problem

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 163
Joined: Tue Jan 13, 2015 11:44 am
Thanked: 2 times

Root problem

by didieravoaka » Wed Mar 23, 2016 9:13 am
Does someone can help?

I don't understand why we have to multiple x by 3 for the first quarter. I thought it would have been an addition instead. So that we would have 3+x for the first quarter. At the 9th quarter we would have had 9x instead of 3x to the 9th power.

Image

Thanks.
Top
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
Elite Legendary Member
Posts: 10392
Joined: Sun Jun 23, 2013 6:38 pm
Location: Palo Alto, CA
Thanked: 2867 times
Followed by:511 members
GMAT Score:800

by [email protected] » Wed Mar 23, 2016 9:19 am
Hi didieravoaka,

We're told that every quarter-century (meaning every 25 years), the price of a bushel is X TIMES (meaning multiplication) more expensive. From 1775 to 2000, we have nine 25-year 'periods' in which the bushel becomes X TIMES more expensive with each period, so we're clearly talking about a LOT of multiplication. However, the price in 1775 is $3 and the price in 2000 is only $9, so all of that multiplication leads to a total product that is only 3 times more expensive over the course of 9 periods. There's only one answer that has a 3 AND accounts for 9 'periods'...

Final Answer: E

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image
Top
Master | Next Rank: 500 Posts
Posts: 163
Joined: Tue Jan 13, 2015 11:44 am
Thanked: 2 times

by didieravoaka » Wed Mar 23, 2016 9:22 am
Thanks Rich, I'll keep in mind that X TIMES means multiplication.
Top
Post new topic Post Reply
• Page 1 of 1