Last visit was: 16 Sep 2026, 04:43 It is currently 16 Sep 2026, 04:43
Home
Messages
Tests
Schools
Events
Close
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

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 16 Sep 2026
Posts: 113,568
Own Kudos:
841,586
 [3]
Given Kudos: 111,573
Products:
GMAT Club Tests
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 113,568
Kudos: 841,586
 [3]
Four production lines at a certain factory produced microchips. 11 Nov 2023, 07:53
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
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:

77% (02:02) correct 23% (02:02) wrong based on 177 sessions

History

Date
Time
Result
Not Attempted Yet
Four production lines at a certain factory produced microchips. The number of days that the four production lines produced the microchips was in the ratio of 1 to 2 to 4 to 5. If one of the four production lines produced the microchips for 20 days, which of the following CANNOT be the total number of days that the four production lines produced the microchips?

(A) 48
(B) 60
(C) 100
(D) 120
(E) 240
ShowHide Answer
Official Answer
C
User avatar
VivekSri
User avatar
Joined: 01 May 2022
Last visit: 05 Feb 2026
Posts: 428
Own Kudos:
805
 [1]
Given Kudos: 117
Location: India
WE:Engineering (Consulting)
Posts: 428
Kudos: 805
 [1]
Four production lines at a certain factory produced microchips. 13 Nov 2023, 20:47
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Four production lines at a certain factory produced microchips. The number of days that the four production lines produced the microchips was in the ratio of 1 to 2 to 4 to 5. If one of the four production lines produced the microchips for 20 days, which of the following CANNOT be the total number of days that the four production lines produced the microchips?

(A) 48
(B) 60
(C) 100
(D) 120
(E) 240
Show more

OA is C

Posted from my mobile device
Attachments

Screenshot_20231114_091512_Samsung Notes.jpg
Screenshot_20231114_091512_Samsung Notes.jpg [ 251.08 KiB | Viewed 2612 times ]

User avatar
sachin_27
User avatar
Joined: 23 Apr 2023
Last visit: 08 Jan 2024
Posts: 13
Own Kudos:
5
 [3]
Given Kudos: 20
Posts: 13
Kudos: 5
 [3]
Four production lines at a certain factory produced microchips. 12 Dec 2023, 09:29
3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
1:2:4:5 = 12 days

looking at the options
all options except c is a multiple of 12.
so c.
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 39,225
Own Kudos:
1,159
Posts: 39,225
Kudos: 1,159
Four production lines at a certain factory produced microchips. 06 Apr 2025, 21:25
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderator:
Bunuel
Math Expert
113568 posts