GMAT Changed on April 16th - Read about the latest changes here

 It is currently 24 May 2018, 08:50

# Happening NOW:

INSEAD Rolling Out R1 Admission Decisions - Join CHAT Room2 to Get Latest Updates from Fellow Applicants

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# On the 25th of November in 1990, John was trying

Author Message
TAGS:

### Hide Tags

Senior Manager
Status: Always try to face your worst fear because nothing GOOD comes easy. You must be UNCOMFORTABLE to get to your COMFORT ZONE
Joined: 15 Aug 2014
Posts: 328
Concentration: Marketing, Technology
GMAT 1: 570 Q44 V25
GMAT 2: 600 Q48 V25
WE: Information Technology (Consulting)
On the 25th of November in 1990, John was trying [#permalink]

### Show Tags

27 Jun 2016, 10:11
10
This post was
BOOKMARKED
00:00

Difficulty:

75% (hard)

Question Stats:

47% (01:42) correct 53% (01:23) wrong based on 86 sessions

### HideShow timer Statistics

On the 25th of November in 1990, John was trying to make a new plan for Jan 1991. However, he did not have a new calendar that included Jan 1991. Then, in order to match a new plan for Jan 1991, which of following months of 1990 should he look at?

A. March B. April C. May D. June E. July

Can someone explain how to solve this in easy approach!

_________________

"When you want to succeed as bad as you want to breathe, then you’ll be successful.” - Eric Thomas

I need to work on timing badly!!

Senior Manager
Joined: 22 Jun 2016
Posts: 250
On the 25th of November in 1990, John was trying [#permalink]

### Show Tags

27 Jun 2016, 10:57
Let us assume 31st of Dec, 1989 was a Sunday and 1st of Jan, 1990 was a Monday. As 1990 wasn't a leap year, so number of days in 1990 = 365.

Now 365 mod 7 = 1. That means, 365th day of the year 1990, i.e. 30/12/1990, was a Monday
(if [day of the year] mod 7 = 0 then its day will be same as 31st of Dec, 1989. ex. 7th Jan, 14th Jan and so on)
Similarly if [day of the year] mod 7 = 1 then its day will be same as 1st of Jan, 1990. ex 8th Jan, 15th Jan and so on)

As we now know 365th day of the year 1990, i.e. 30/12/1990, was a Monday, so 1st of Jan, 1991 will be a Tuesday.

Now, we have to find out which month among the options has 1st of that month as a Tuesday.

1st of March is 31(Jan)+28(Feb)+1 day of the year = 60. So, 60 mod 7 = 4. So, 1st of March was a Thursday.
So option A is out.

Option B.
1st of April is 31(Jan)+28(Feb)+31(March)+1 day of the year = 91. So 91 mod 7 = 0. So, 1st of April was a Sunday.
Option B is out.

Option C.
1st of May is 31(Jan)+28(Feb)+31(March)+30(April)+1 day of the year = 121. So 120 mod 7 = 2. So, 1st of May was a Tuesday.
Hence, we have got our answer.

Answer C. Day of 1st of May, 1990 is same as Day of 1st of Jan, 1991.

----------------------------------------

P.S. Don't forget to give Kudos
_________________

P.S. Don't forget to give Kudos

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 8077
Location: Pune, India
Re: On the 25th of November in 1990, John was trying [#permalink]

### Show Tags

27 Jun 2016, 22:23
6
KUDOS
Expert's post
4
This post was
BOOKMARKED
smartguy595 wrote:
On the 25th of November in 1990, John was trying to make a new plan for Jan 1991. However, he did not have a new calendar that included Jan 1991. Then, in order to match a new plan for Jan 1991, which of following months of 1990 should he look at?

A. March B. April C. May D. June E. July

Can someone explain how to solve this in easy approach!

You need to find the month which will replicate the month of Jan 1991. This will happen when the number of days between the 1st of that month and 1st Jan are a multiple of 7.
Each month has at least 28 days which is a multiple of 7.
Start from July (option (E)) - July has 3 additional days. August has 3. Sep has 2. Oct has 3. Nov has 2. Dec has 3.
3 + 3 + 2 + 3 + 2 + 3 = 16
June has 2 additional days so 16+2 = 18
May has 3 additional days so 18+3 = 21

Starting from May 1, the number of days is a multiple of 7 till Jan 1991 so Jan calendar will mirror the May calendar.

_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Manager
Joined: 30 Apr 2017
Posts: 75
Re: On the 25th of November in 1990, John was trying [#permalink]

### Show Tags

02 Nov 2017, 14:31
VeritasPrepKarishma wrote:
smartguy595 wrote:
On the 25th of November in 1990, John was trying to make a new plan for Jan 1991. However, he did not have a new calendar that included Jan 1991. Then, in order to match a new plan for Jan 1991, which of following months of 1990 should he look at?

A. March B. April C. May D. June E. July

Can someone explain how to solve this in easy approach!

You need to find the month which will replicate the month of Jan 1991. This will happen when the number of days between the 1st of that month and 1st Jan are a multiple of 7.
Each month has at least 28 days which is a multiple of 7.
Start from July (option (E)) - July has 3 additional days. August has 3. Sep has 2. Oct has 3. Nov has 2. Dec has 3.
3 + 3 + 2 + 3 + 2 + 3 = 16
June has 2 additional days so 16+2 = 18
May has 3 additional days so 18+3 = 21

Starting from May 1, the number of days is a multiple of 7 till Jan 1991 so Jan calendar will mirror the May calendar.

Hi
this question needs one knows about numbers of the months in each month, which is not ordinary for internationals!
is it possible we see such question in real GMAT?
Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 8077
Location: Pune, India
Re: On the 25th of November in 1990, John was trying [#permalink]

### Show Tags

02 Nov 2017, 21:39
soodia wrote:
VeritasPrepKarishma wrote:
smartguy595 wrote:
On the 25th of November in 1990, John was trying to make a new plan for Jan 1991. However, he did not have a new calendar that included Jan 1991. Then, in order to match a new plan for Jan 1991, which of following months of 1990 should he look at?

A. March B. April C. May D. June E. July

Can someone explain how to solve this in easy approach!

You need to find the month which will replicate the month of Jan 1991. This will happen when the number of days between the 1st of that month and 1st Jan are a multiple of 7.
Each month has at least 28 days which is a multiple of 7.
Start from July (option (E)) - July has 3 additional days. August has 3. Sep has 2. Oct has 3. Nov has 2. Dec has 3.
3 + 3 + 2 + 3 + 2 + 3 = 16
June has 2 additional days so 16+2 = 18
May has 3 additional days so 18+3 = 21

Starting from May 1, the number of days is a multiple of 7 till Jan 1991 so Jan calendar will mirror the May calendar.

Hi
this question needs one knows about numbers of the months in each month, which is not ordinary for internationals!
is it possible we see such question in real GMAT?

You mean that do we need to know the number of days in each month? Yes, it is expected of us to know. The digital world all across follows the same calendar and considering that it is an online exam, knowledge of this calendar is pretty basic.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Re: On the 25th of November in 1990, John was trying   [#permalink] 02 Nov 2017, 21:39
Display posts from previous: Sort by