GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video
close
It is currently 02 Aug 2021, 13:07
Register
GMAT Club Tests
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
If John has exactly 10 coins each of which was minted in 1910 or 1920
3 posts Go to First Unread Post
Print view
NEW TOPIC
POST REPLY
Downloads
My Bookmarks
Reviews
SORT BY:
Date
Kudos
Tags:
Find Similar Topics 

Show Tags
Hide Tags

User avatar
V
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 78155
Premium Member CAT Tests Forum Quiz Mode Top Member of the Month
If John has exactly 10 coins each of which was minted in 1910 or 1920 [#permalink] New post  23 May 2020, 06:18
8
Bookmarks
Expert Reply
Attempt only this question Same topic and source Same topic and difficulty Same source and difficulty Random Chronological Reverse chronological Learn more
00:00
A
B
C
D
E

Difficulty:

15% (low)

Question Stats:

81% (01:17) correct 19% (00:58) wrong based on 99 sessions

Hide Show timer Statistics

If John has exactly 10 coins each of which was minted in 1910 or 1920 or 1930, how many of his coins were minted in 1920 ?

(1) Exactly 6 of his coins were minted in 1910 or 1920.
(2) Exactly 7 of his coins were minted in 1920 or 1930.



DS21261
ShowHide Answer
Official Answer
Official Answer and Stats are available only to registered users. Register/Login.

_________________
New to the GMAT CLUB Forum?

My Signature Questions' Collection:


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics
Signature Read More
Attempt only this question Same topic and source Same topic and difficulty Same source and difficulty Random Chronological Reverse chronological Learn more
User avatar
V
yashikaaggarwal
Senior Moderator - Masters Forum
Joined: 18 Jan 2020
Posts: 2604
Location: India
Schools: ESSEC MiM "23
GPA: 4
CAT Tests
Re: If John has exactly 10 coins each of which was minted in 1910 or 1920 [#permalink] New post  23 May 2020, 06:26
1
Bookmarks
John has exactly 10 coins each of which was minted in 1910 or 1920 or 1930, how many of his coins were minted in 1920 ?

Statement (1) Exactly 6 of his coins were minted in 1910 or 1920.
But how many in 1920?
All 6, 5,4,3... Or nothing. (Insufficient)

Statement (2) Exactly 7 of his coins were minted in 1920 or 1930.
But how many in 1920?
All 7,6,5,.... Or nothing at all.
(Not sufficient)

1&2: let 1910 be A
1920 be B and 1930 be C
A+B=6 ------(1)
B+C=7 ------(2)
A+B+C=10 ----(3)
Equate 1&3
C=4
And from equation 2&3
A=3
Therefore B=3
So 3 coins were minted in 1920

Answer is C
Posted from my mobile device
avatar
S
UNSTOPPABLE12
Manager
Manager
Joined: 16 Jul 2018
Posts: 185
GMAT ToolKit User Premium Member
Re: If John has exactly 10 coins each of which was minted in 1910 or 1920 [#permalink] New post  27 Jan 2021, 06:12
Hello one prompt question, regarding this question , statement A says, "Exactly 6 of his coins were minted in 1910 or 1920", so in the beginning I thought that all 6 of them were either minted in 1910 or 1920 , only by combining both statements I realized that eg.3 could have been made in 1910 and the other 3 in 1920 etc. , so I was wondering, how would the wording be if we meant that all 6 of them were minted in a single year 1910 or 1920?
GMAT Club Bot
gmatclubot
Re: If John has exactly 10 coins each of which was minted in 1910 or 1920 [#permalink]
27 Jan 2021, 06:12
NEW TOPIC
POST REPLY
Downloads
My Bookmarks
Reviews
Moderators:
chetan2u
Math Expert
10175 posts
Bunuel
Math Expert
78155 posts
GMATBusters
GMAT Tutor
2009 posts
nick1816
DS Forum Moderator
2295 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