NEW HERE? LEARN MORE
closeclose
Last visit was: 25 Apr 2024, 09:09 It is currently 25 Apr 2024, 09:09
Decision Tracker
My Rewards
New posts
New comers' posts

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

How many times do the hands of a clock coincide in a day?

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92914
Own Kudos [?]: 618958 [1]
Given Kudos: 81595
Send PM
CAT Tests Forum Quiz Mode
How many times do the hands of a clock coincide in a day? [#permalink] New post   22 Jun 2021, 04:45
1
Bookmarks
Expert Reply
00:00
A
B
C
D
E

Difficulty:

65% (hard)

Question Stats:

27% (00:52) correct 73% (00:59) wrong based on 49 sessions
Hide Show timer Statistics
How many times do the hands of a clock coincide in a day?

(A) 20
(B) 21
(C) 22
(D) 23
(E) 24
ShowHide Answer
Official Answer
C
avatar
B
arunavac
Intern
Intern
Joined: 01 Feb 2021
Posts: 7
Own Kudos [?]: 1 [0]
Given Kudos: 165
Location: India
Concentration: Marketing, International Business
GPA: 3.1
WE:Sales (Advertising and PR)
Send PM
Re: How many times do the hands of a clock coincide in a day? [#permalink] New post   22 Jun 2021, 04:49
1.05 am
2.10 am
3.15 am
4.20 am
5.25 am
6.30 am
7.35 am
8.40 am
9.45 am
10.50 am
11.55 am
12.00 pm
.
.
.
.
.
12.00 am

12*2 = 24 times

Posted from my mobile device
avatar
B
SushantSaini
Intern
Intern
Joined: 05 Apr 2021
Posts: 23
Own Kudos [?]: 10 [0]
Given Kudos: 204
Location: India
Schools: ISB '24 (A$$)
GMAT 1: 740 Q50 V39
GPA: 4
Send PM
Re: How many times do the hands of a clock coincide in a day? [#permalink] New post   03 May 2022, 00:27
arunavac wrote:
1.05 am
2.10 am
3.15 am
4.20 am
5.25 am
6.30 am
7.35 am
8.40 am
9.45 am
10.50 am
11.55 am
12.00 pm
.
.
.
.
.
12.00 am

12*2 = 24 times

Posted from my mobile device




The answer will be 22. The problem with your approach is that you are not taking into account the movement of the hour hand in one hour. The first time both min and hour hand meet is actually at 1:05:25. So in 12 hours they coincide only 11 times.
You can try it in your wrist watch if you like ;) ;)
User avatar
B
cyrwr1
Manager
Manager
Joined: 18 Jan 2011
Posts: 64
Own Kudos [?]: 21 [0]
Given Kudos: 86
Send PM
Re: How many times do the hands of a clock coincide in a day? [#permalink] New post   03 May 2022, 08:54
every 12 hours result in 11 overlaps.
the actually time of overlap is calculated with: minutes after the hour = h (# of hours) * 12/11 * 5 minutes
starting with 12:00 and then 1*12/11*5=60/11 minutes= 5 minutes and 5/11 minute or about 5 mins and 27 secs --> 01:05:27, ....
GMAT Club Bot
gmatclubot
Re: How many times do the hands of a clock coincide in a day? [#permalink]
03 May 2022, 08:54
Moderators:
Bunuel
Math Expert
92914 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions