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.
Nov 17Live Online Classes with Top GRE Expert Rich Zwelling
08:00 PM EST
-10:00 PM EST
Get live instruction from a top-scoring, industry-recognized GRE teachers + 6 months of access to TTP Self-Study included! Tues/Thur Sept 7, 2026---Feb. 2, 2027, 1:00pm-3:00pm EST
Dec 14Live Online Classes with Top GRE Expert Michael Butville
08:00 PM EST
-10:00 PM EST
Get live instruction from a top-scoring, industry-recognized GRE teachers + 6 months of access to TTP Self-Study included! Mon/Wed Dec. 14, 2026---Feb. 22, 2027, 8:00pm-10:00pm EST
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Given Kudos: 172
Location: India
WE:Education (Education)
Marie has two electronic beepers: one beeps 5 times every 90 seconds
[#permalink]
04 Mar 2021, 11:32
04 Mar 2021, 11:32
10
Bookmarks
00:00
Question Stats:
52% (02:26) correct
48% (03:17) wrong based on 25 sessions
Hide Show timer Statistics
Marie has two electronic beepers: one beeps 5 times in every 90 seconds and the other one beeps 6 times in every 96 seconds. If both the beepers are started simultaneously, how many times will they beep together in next 3 hours 35 mins and 16 seconds?
Show: ::
89
Re: Marie has two electronic beepers: one beeps 5 times every 90 seconds
[#permalink]
04 Mar 2021, 17:12
04 Mar 2021, 17:12
4
1
Bookmarks
Beeper 1 - Beeps every 18 sec (5 times for every 90s)
Beeper 2 - Beeps every 16 sec (6 times every 96s)
Therefore they overlap every 144 sec (LCM of 18 and 16)
3 hours 35 mins and 16 seconds
= 3*3600 + 35*60 + 16 = 12916
Therefore common beep times = 12916/144 = 89.xxx; discard decimal for 89
Beeper 2 - Beeps every 16 sec (6 times every 96s)
Therefore they overlap every 144 sec (LCM of 18 and 16)
3 hours 35 mins and 16 seconds
= 3*3600 + 35*60 + 16 = 12916
Therefore common beep times = 12916/144 = 89.xxx; discard decimal for 89
General Discussion
Re: Marie has two electronic beepers: one beeps 5 times every 90 seconds
[#permalink]
07 Sep 2025, 18:24
07 Sep 2025, 18:24
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
