Events & Promotions
|
|
GMAT 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.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
28 Mar 2018, 02:50
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (02:10) correct
22%
(01:52)
wrong
based on 171
sessions
History
Date
Time
Result
Not Attempted Yet
A collection of U.S. coins consists of pennies, nickels, dimes, and quarters, in the ratio 2:3:5:6, respectively. If the number of coins of one of the denominations is 30, which of the following CANNOT be the total number of coins in the collection?
(A) 80
(B) 96
(C) 112
(D) 160
(E) 240
(A) 80
(B) 96
(C) 112
(D) 160
(E) 240
29 Mar 2018, 19:53
Kudos
Bookmarks
Bunuel
You can't just add ratio parts and look for the answer that is NOT a multiple of 16. The answers are all multiples of 16.
Respectively, each answer, divided by 16, has a quotient of 5, 6, 7, 10, and 15
One way to find which answer is impossible:
Call the multiplier x
Find x if 6x=30
If 5x = 30
If 3x = 30
If 2x = 30
The arithmetic is not complicated. Multiply and sum.
If there are 30 of the 6x coin:
6x = 60, and x = 5
5x = 25, 3x = 15, 2x = 10
30 + 25 + 15 + 10 = 80. That's answer A
If there are 30 of the 5x coin:
5x = 30 and x = 6
6x = 36, 3x = 18, 2x = 22
30 + 36 + 18 + 12 = 96. That's answer B
If there are 30 of the 3x coin:
3x = 30 and x = 10
6x = 60, 5x = 50, 2x = 20
30 + 60 + 50 + 20 = 160 That's Answer D
If there are 30 of the 2x coin:
2x = 30 and x = 15
6x = 90, 5x = 75, 3x = 45
30 + 90 + 75 + 45 = 240. That's Answer E
112 does not work
Answer C
Updated on: 29 Mar 2018, 23:40
Originally posted by GMATBusters on 29 Mar 2018, 20:00.
Last edited by GMATBusters on 29 Mar 2018, 23:40, edited 1 time in total.
Last edited by GMATBusters on 29 Mar 2018, 23:40, edited 1 time in total.
Kudos
Bookmarks
The ratio is 2:3:5:6
Let the coins are 2x,3x, 5x, 6x.
Total = 16x
Since one of the coin is 30.
X can be 15, 20, 6, 5.
Hence total can be 16x = 240, 320, 96 or 80.
Hence total cannot be 112. Answer is C
Let the coins are 2x,3x, 5x, 6x.
Total = 16x
Since one of the coin is 30.
X can be 15, 20, 6, 5.
Hence total can be 16x = 240, 320, 96 or 80.
Hence total cannot be 112. Answer is C
