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January 1, 1995 was a Sunday. What day of the week lies on January 1, 1996?

A.

B.

Monday

C.

Friday

D.

Sunday

Answer with explanation

Answer: Option BExplanation

The number of days more than the complete weeks are called odd days in a given period.

1 ordinary year ≡ 365 days ≡ (52 weeks + 1 day)

Hence the number of odd days in 1 ordinary year= 1.

1 leap year ≡ 366 days ≡ (52 weeks + 2 days)

Hence the number of odd days in 1 leap year= 2.

100 years ≡ (76 ordinary years + 24 leap years )

= (76 x 1 + 24 x 2) odd days = 124 odd days.

=> (17 weeks + 5 days)

≡ 5 odd days.

Hence the number of odd days in 100 years = 5.

Number of odd days—->Day of the week

==>0—->Sunday

==>1—->Monday

==>2—->Tuesday

==>3—->Wednesday

==>4—->Thursday

==>5—->Friday

==>6—->Saturday

The last day of a century cannot be Tuesday or Thursday or Saturday.

because 100 century consists of 5 odd days, which means Friday is the last day.

200 century consists of 3 odd days, which means Wednesday is the last day.

300 century consists of 1 odd day, which means Monday is the last day.

400 century doesn’t consist of any odd day.

the cycle continues, hence proof.

1995 is an ordinary year, it has 1 odd day. So, the first day of 1996 will be one day beyond Sunday, i.e. it will be Monday.

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Pinky was born on 29th, Feb 2016 which happened to be a Monday. If she lives to be till 2099, how many birthdays would she celebrate on a Monday?

A.

1

B.

3

C.

2

D.

5

Answer with explanation

Answer: Option CExplanation

29th Feb, 2016 = Monday => 28th Feb, 2012 = Sunday

28th Feb 2017 = Tuesday (because 2016 is a leap year, there will be 2 odd days)

Therefore» Feb 28th, 2018 (Wednesday), Feb 28th, 2019 (Thursday), Feb 28th, 2020 (Friday), Feb 29th, 2020 (Saturday)

Or, Feb 29th to Feb 29th after 4 years, we have 5 odd days.

So, every subsequent birthday would come after 5 odd days.

2020 birthday – 5 odd days

2024 birthday – 10 odd days = 3 odd days

2028 birthday – 8 odd days = 1 odd day

2032 birthday – 6 odd days

2036 birthday – 11 odd days = 4 odd days

2040 birthday – 9 odd days = 2 odd days

2044 birthday – 7 odd days = 0 odd days. So, after 28 years, his birthday would fall on Monday.

The next birthday on Monday would be in the year 2072 (further 28 years later), the one after that would be in the year 2100. But we are told that she lives up to the year 2099.

So, there are 2 occurrences of his birthday falling on Monday – 2044 & 2072.

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On what dates of July.2004 did Monday fall?

A.

6th,10th,21st,30th

B.

12th,7th,19th,28th

C.

5th,10th,24th,17th

D.

5th, 12th, 19th, 26th

Answer with explanation

Answer: Option DExplanation

Let us find the day on 1st July 2004.

2000 years have 0 odd days. 3 ordinary years have 3 odd days.

Jan. Feb. March April May June July

31 + 29 + 31 + 30 + 31 + 30 + 1

= 183 days = (26 weeks + 1 day) = 1 t .

Total number of odd days = (0 + 3 + 1) odd days = 4 odd days. ‘

:. 1st July 2004 was ‘Thursday’,-,-

Thus, 1st Monday in July 2004 _as on 5th July.

Hence, during July 2004, Monday fell on 5th, 12th, 19th, and 26th…

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** If 18th February, 1997 falls on Tuesday then what will be the day on 18th February, 1999?**

A.

Thursday

B.

Friday

C.

Monday

D.

Tuesday

Answer with explanation

Answer: Option AExplanation

18th February 1997 was Tuesday.

So, 18th February 1998 was Wednesday.

Therefore, 18th February 1999 will be Thursday.

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The second Saturday and every Sunday is a holiday. How many working days will be there in a month of 30 days beginning on a Saturday?

A.

22

B.

23

C.

24

D.

21

Answer with explanation

Answer: Option CExplanation

The mentioned month begins on a Saturday and has 30 days

Sundays = 2nd, 9th, 16th, 23rd, 30th

=> Total Sundays = 5

Every second Saturday is a holiday.

1 second Saturday in every month

Total days in the month = 30

Total working days = 30 – (5 + 1) = 24

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Which of the following year is not a leap year?

A.

1960

B.

2080

C.

2024

D.

2100

Answer with explanation

Answer: Option DExplanation

The two conditions that decide that a year is a leap year or not is:

• For a year to be a leap year, it should be divisible by 4.

• No century is a leap year unless it is divisible by 400.

Hence, the year 2100 is not a leap year as it is not divisible by 400.

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It was Sunday on Jan 1, 2006. Discover the week’s day on Jan 1, 2010.

Answer with explanation

Answer: Option CExplanation

On 31st December,2005 it was Saturday. Number of odd days frame the year 2006 to the year 2009=(1+1+2+1)=5 days. ∴ On 31st December 2009 , it was Thursday. In this way, on first jan, 2010 it is Friday

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Today is Thursday. The day after 59 days will be?

A.

Sunday

B.

Tuesday

C.

Wednesday

D.

Monday

Answer with explanation

Answer: Option AExplanation

59 days = 8 weeks 3 days = 3 odd days

Hence if today is Thursday, After 59 days, it will be = Thursday + 3 odd days = Sunday.

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If 5th March, 2005 is Monday, what was the day of the week on 5th March, 2004 ?

A.

Sunday

B.

Monday

C.

Tuesday

D.

Friday

Answer with explanation

Answer: Option AExplanation

The year 2004 is a leap year. So, it has 2 odd days.

But, Feb 2004 not included because we are calculating from March 2004 to March 2005. So it has 1 odd day only.

The day of 5th March 2005 will be 1 day beyond the day of 5th March 2004.

Given that, 5th March 2005 is Monday.

5th March 2004 is Sunday (1 day before to 5th March 2005).

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On 8th Feb 2005 it was Tuesday. What was the day of the week on 8th Feb 2004?

A.

Tuesday

B.

Sunday

C.

Monday

D.

Saturday

Answer with explanation

Answer: Option BExplanation

The year 2004 is a leap year. It has 2 odd days.

The day on 8^{th} Feb, 2004 is 2 days before the day on 8^{th} Feb, 2005.

Hence, this day is Sunday.

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On July 2, 1985, it was Wednesday. The day of the week on July 2, 1984 was

A.

Wednesday

B.

Tuesday

C.

Monday

D.

Thursday

Answer with explanation

Answer: Option BExplanation

Let us calculate the number of odd days between these two dates.

July month of 1984 has 29 days left. So odd days are 1.

Now August 1984 to June 1985 ===>> 3 + 2 + 3 + 2 + 3 + 2 + 0 + 3 + 2 + 3 + 2.

Now July 1985 till 2nd July contains 2 odd days.

Total 29 odd days. or 1 odd day.

So July 2, 1984, is 1 day before Wednesday. It is Tuesday.

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On 8th march,2005,wednesday falls what day of the week was it on 8th march,2004?

A.

Monday

B.

Tuesday

C.

Wednesday

D.

Friday

Answer with explanation

Answer: Option BExplanation

As a year contains 365 days with factors of 7(1week) gives 1(day) as a reminder which adjusts one day extra to the next year.

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How many leap years do 300 years have?

A.

74

B.

75

C.

76

D.

72

Answer with explanation

Answer: Option DExplanation

Given year is divided by 4, and the quotient gives the number of leap years. But, as 100,200 and 300 are not leap years => 75 – 3= 72 leap years.

OR

A 300-year period can have either 72 or 73 leap years. Each 400-year cycle of the Gregorian calendar has 97 leap years, so the average number of leap years for a 300-year period is 72.75.

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