GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
A cashier mentally reversed the digits of one customer's correct amoun
[#permalink]
14 May 2022, 08:14
14 May 2022, 08:14
Expert Reply
00:00
Question Stats:
87% (01:56) correct
12% (01:30) wrong based on 8 sessions
Hide Show timer Statistics
A cashier mentally reversed the digits of one customer's correct amount of change and thus gave the customer an incorrect amount of change. If the cash register contained 45 cents more than it should have as a result of this error, which of the following could have been the correct amount of change in cents?
A 14
B 45
C 54
D 65
E 83
A 14
B 45
C 54
D 65
E 83
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: A cashier mentally reversed the digits of one customer's correct amoun
[#permalink]
14 May 2022, 11:11
14 May 2022, 11:11
1
Carcass wrote:
A cashier mentally reversed the digits of one customer's correct amount of change and thus gave the customer an incorrect amount of change. If the cash register contained 45 cents more than it should have as a result of this error, which of the following could have been the correct amount of change in cents?
A 14
B 45
C 54
D 65
E 83
A 14
B 45
C 54
D 65
E 83
STRATEGY: Upon reading any GRE Multiple Choice question, we should always ask, Can I use the answer choices to my advantage?
In this case, we can easily test the answer choices.
Now let's give ourselves up to 20 seconds to identify a faster approach.
In this case, we can solve the question algebraically, but testing the answer choices will be super fast.
If the cash register contained 45 cents more than it should have, we know that the cashier gave the customer LESS change than they were supposed to.
In other words, the correct amount of change that should have been given to the customer must be GREATER THAN the actual amount of change the cashier gave the customer.
So, we can automatically eliminate answers choices A and B, because these values result in the customer receiving MORE change then they should have.
We've already reduced the possible answers to C, D and E.
Let's now test answer choice D, the middle answer
D) 65 cents
If 65 cents is the correct amount of change, then the cashier would have given 56 cents to the customer.
Since 65 - 56 = 9, we can see that this error results in a difference of only 9 cents, and the question tells us that the difference must be 45 cents.
Eliminate choice D.
When we scan the remaining to answer choices (C and E), we see that choice E (when reversed) results in a difference of 45 cents.
Let's test it anyway.
E) 83 cents
Since 83 - 38 = 45, this error results in a difference of 45 cents, and since at the cashier gave the customer 45 cents less than they should have, the cash register contain 45 cents more than it should have. Perfect!!
Answer: E
gmatclubot
Re: A cashier mentally reversed the digits of one customer's correct amoun [#permalink]
14 May 2022, 11:11
Moderators:
