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805+ (Hard)|   Word Problems|      
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Bunuel
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On the 25thmber in 2020, John was trying to make a new plan 24 Nov 2023, 09:24
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C
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95% (hard)

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42% (02:10) correct 58% (01:56) wrong based on 131 sessions

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On the 25th of November in 2020, John was trying to make a new plan for January 2021. However, he did not have a new calendar that included January 2021. Then, in order to match a new plan for January 2021, which of the following months of 2020 should he look at?

A. March
B. April
C. May
D. June
E. July
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C
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VibhuAnurag
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On the 25thmber in 2020, John was trying to make a new plan 27 Nov 2023, 15:28
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The answer is C.

Months in a calendar will be replicas of each other when the gap between the 1st of both months is a multiple of 7.
Each month in a year (barring February in non-leap years) has 4 weeks + some extra days.

Working back from Jan, 2021:
Dec, 2020 --> 28 + 3 extra days (Total extra days = 3)
Nov, 2020 --> 28 + 2 extra days (Total extra days = 5)
Oct, 2020 --> 28 + 3 extra days (Total extra days = 8)
Sep, 2020 --> 28 + 2 extra days (Total extra days = 10)
Aug, 2020 --> 28 + 3 extra days (Total extra days = 13)
Jul, 2020 --> 28 + 3 extra days (Total extra days = 16)
Jun, 2020 --> 28 + 2 extra days (Total extra days = 18)
May, 2020 --> 28 + 3 extra days (Total extra days = 21)

Hence, John should look at May, 2020.
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On the 25thmber in 2020, John was trying to make a new plan 25 Aug 2024, 22:32
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Bunuel
On the 25th of November in 2020, John was trying to make a new plan for January 2021. However, he did not have a new calendar that included January 2021. Then, in order to match a new plan for January 2021, which of the following months of 2020 should he look at?

A. March
B. April
C. May
D. June
E. July
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­Yes, calendars are a part of non Math DI and this question is fairly straight forward. You want to know which month of 2020 will align with Jan 2021 when considering days of the week.

Jan 2021 will match up with whichever month gives us complete weeks from its starting till 31st Dec.
Hence simply add the days of the months: 31 (Dec) + 30 (Nov) + 31(Oct) + 30(Sep) + 31(Aug) + 31(July) = 30*6 + 3 = 183 (not divisible by 7)
183 + 30(June) = 214 (not divisible by 7)
214 + 31 (May) = 245 (divisible by 7)
This means starting from May 1 onwards till Dec 31, you will get 35 full weeks so Jan 1 will start with the same day as May 1.
So if May 1 is Monday, Jan 1 will also be Monday and so on.

Answer (C)

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On the 25thmber in 2020, John was trying to make a new plan 10 Dec 2023, 06:23
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Sadly, without knowing the method given in the prior response, one will just have to work through it.

It doesn't matter what the actual day of the week was for November 25, 2020. Any day will do as a starting point from which to determine the corresponding day of the week for January 1st 2021, since the objective is to then work backwards to find the month in 2020 that matches the days of the week and dates, keeping in mind which months have 30 and 31 days.

Assume 11/25 is Sunday. That means 12/2 is a Sunday, 12/30 is also Sunday and therefore:

January 1, 2021 is a Tuesday.

So, which among the answer choices has the first of the month as Tuesday ?

Each of the below needing to be checked for which date the first Tuesday falls.

Working backwards from 11/25, 11/4 was a Sunday, therefore 10/28 was also and so 10/7.

This makes 9/30 Sunday and therefore 9/2.

8/26 also becomes Sunday and therefore 8/5.

This makes 7/29 and therefore 7/1 Sunday.

This makes June 24 and therefore June 3 Sunday.

With 31 days in May, this means May 27 and May 6 are Sundays.

5/6 Sunday
5/5 Saturday
5/4 Friday
5/3 Thursday
5/2 Wednesday and

5/1 Tuesday, matching the desired day in a month of the same number of days.

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On the 25thmber in 2020, John was trying to make a new plan 25 Aug 2024, 09:46
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Bunuel
On the 25th of November in 2020, John was trying to make a new plan for January 2021. However, he did not have a new calendar that included January 2021. Then, in order to match a new plan for January 2021, which of the following months of 2020 should he look at?

A. March
B. April
C. May
D. June
E. July
Show more
­Hello Experts, (KarishmaB, MartyMurray, Bunuel, gmatophobia, @gmatninja)

Is there a faster and better approach to this question? Can this be expected in the exams?

Thank you!­
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On the 25thmber in 2020, John was trying to make a new plan 21 Sep 2025, 15:01
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