Last visit was: 27 Apr 2026, 02:29 It is currently 27 Apr 2026, 02:29
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.
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 27 Apr 2026
Posts: 109,922
Own Kudos:
811,501
 [4]
Given Kudos: 105,912
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 109,922
Kudos: 811,501
 [4]
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
User avatar
pushpitkc
Joined: 26 Feb 2016
Last visit: 19 Feb 2025
Posts: 2,800
Own Kudos:
6,236
 [3]
Given Kudos: 47
Location: India
GPA: 3.12
Posts: 2,800
Kudos: 6,236
 [3]
3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
rishabhmishra
Joined: 23 Sep 2016
Last visit: 16 Aug 2019
Posts: 177
Own Kudos:
Given Kudos: 29
Products:
Posts: 177
Kudos: 466
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Hatakekakashi
Joined: 07 Jan 2016
Last visit: 22 Feb 2025
Posts: 1,228
Own Kudos:
Given Kudos: 126
Location: United States (MO)
GMAT 1: 710 Q49 V36
Products:
GMAT 1: 710 Q49 V36
Posts: 1,228
Kudos: 483
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
If a certain machine produces bolts at a constant rate, how many seconds will it take the machine to produce 300 bolts?

(1) It takes the machine 56 seconds to produce 40 bolts.

(2) It takes the machine 1.4 seconds to produce 1 bolt.

Statement 1

56 seconds - 40
x - 300

x can be calculated

sufficient

Statement 2

1.4 seconds - 1 bolt
x - 300

Sufficient

Must be D

Level 500-600 may be
User avatar
Kinshook
User avatar
Major Poster
Joined: 03 Jun 2019
Last visit: 27 Apr 2026
Posts: 5,987
Own Kudos:
Given Kudos: 163
Location: India
GMAT 1: 690 Q50 V34
WE:Engineering (Transportation)
Products:
GMAT 1: 690 Q50 V34
Posts: 5,987
Kudos: 5,860
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Asked: If a certain machine produces bolts at a constant rate, how many seconds will it take the machine to produce 300 bolts?

(1) It takes the machine 56 seconds to produce 40 bolts.
The machine will take 56*7.5 = 420 seconds to produce 40*7.5= 300 bolts
SUFFICIENT

(2) It takes the machine 1.4 seconds to produce 1 bolt.[/quote]
The machine will take 1.4*300 = 420 seconds to produce 1*300= 300 bolts
SUFFICIENT

IMO D
User avatar
MBAHOUSE
User avatar
MBA House Admissions Consultant
Joined: 26 May 2022
Last visit: 23 Apr 2024
Posts: 337
Own Kudos:
Expert
Expert reply
Posts: 337
Kudos: 98
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Rule of three is usually used to solve gmat questions.
Attachments

FAA483FB-EBE5-45B0-97E7-09B4A291CE2E.jpeg
FAA483FB-EBE5-45B0-97E7-09B4A291CE2E.jpeg [ 255.49 KiB | Viewed 5899 times ]

User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,990
Own Kudos:
Posts: 38,990
Kudos: 1,118
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.
Moderators:
Math Expert
109922 posts
498 posts
212 posts