3
Q:

# What was the day on 31st Dec,2011 ?

 A) Monday B) Saturday C) Sunday D) Friday

Explanation:

31st Dec, 2011 = (2010 years + Period from 1.1.2011 to 31.12.2011)

Odd days in 2000 years = 0

10 years has 2 leap years + 8 ordinary years.

Number of odd days in 10 years ( 2 x 2 + 8) = 5 odd days.

31st,Dec => complete year of 2011 (non-leap year) = 1 odd day.

Total number of odd days = (0 + 5 + 1) = 6.

Given day is saturday.

Q:

26 january 1950 which day of the week?

 A) Monday B) Wednesday C) Thursday D) Tuesday

Explanation:

We know that,

Odd days --> days more than complete weeks

Number of odd days in 400/800/1200/1600/2000 years are 0.

Hence, the number of odd days in first 1600 years are 0.

Number of odd days in 300 years = 1

Number of odd days in 49 years = (12 x 2 + 37 x 1) = 61 days = 5 odd days

Total number of odd days in 1949 years = 1 + 5 = 6 odd days

Now look at the year 1950

Jan 26 = 26 days = 3 weeks + 5 days = 5 odd days

Total number of odd days = 6 + 5 = 11 => 4 odd days

Odd days :-

0 = sunday ;

1 = monday ;

2 = tuesday ;

3 = wednesday ;

4 = thursday ;

5 = friday ;

6 = saturday

Therefore, Jan 26th 1950 was Thursday.

2 67
Q:

Which two months in a year have the same calendar?

 A) October, December B) April, November C) June, October D) April, July

Explanation:

If the period between the two months is divisible by 7, then that two months will have the same calender .

Now,
(a). October + November = 31 + 30 = 61 (not divisible by 7)

(b). Apr. + May + June + July + Aug. + Sep. + Oct. = 30 + 31 + 30 + 31 + 31 +30 + 31 = 213 (not divisible by 7)

(c). June + July + Aug. + Sep. = 30 + 31 + 31 + 30 = 122 (not divisible by 7)

(d). Apr. + May + June = 30 + 31 + 30 = 91 (divisible by 7)

Hence, April and July months will have the same calendar.

26 6572
Q:

How many seconds in 10 years?

 A) 31523500 sec B) 315360000 sec C) 315423000 sec D) 315354000 sec

Explanation:

We know that,

1 year = 365 days

1 day = 24 hours

1 hour = 60 minutes

1 minute = 60 seconds.

Then, 1 year = 365 x 24 x 60 x 60 seconds.

= 8760 x 3600

1 year = 31536000 seconds.

Hence, 10 years = 31536000 x 10 = 315360000 seconds.

16 3632
Q:

Suppose today is Friday, what day of the week will it be 65 days from now?

 A) Saturday B) Sunday C) Friday D) Thursday

Explanation:

The day of the week repeats every 7 days.

Given today is Friday. Again Friday is repeated on the 7th day, 14th,... on 7 multiple days.

Hence, Friday is on the 63rd day, as 63 is multiple of 7.

Now, the required day of the week on the 65th day is Sunday.

18 3752
Q:

What is two weeks from today?

 A) same day B) previous day C) next day D) None

Explanation:

We know that the day repeats every 7 days, 14 days, 21 days,...

So if today is Monday, after 7 days it is again Monday, after 14 days again it is Monday.

Hence, after 2 weeks i.e, 14 days the day repeats and is the same day.

12 3307
Q:

How old are you if you are born in 1995?

 A) 22 B) 23 C) 24 D) 25

Explanation:

Calculating Age has 2 conditions. Let your Birthday is on January 1st.

1. If the month in which you are born is completed in the present year i.e, your birthday, then

Your Age = Present year - Year you are born

As of now, present year = 2018

i.e, Age = 2018 - 1995 = 23 years.

2. If the month in which you are born is not completed in the present year i.e, your birthday, then

Your Age = Last year - Year you are born

As of now, present year = 2018

i.e, Age = 2017 - 1995 = 22 years.

11 3118
Q:

The day before yesterday, I was 25 years old, and next year I will turn 28. How is it possible?

On carefully inspecting this question, one can understand that there are two days which are important and these are:

A. My Birthday.

B. The day when I am making this statement.

If you think for a while, you will understand that such statements can be made only around the year’s end. So, if my birthday is on 31 December, then I will be making this statement on 1 January.

I will further explain using the following example:

1. Consider that today is 01 January 2017.

2. Then, the day before yesterday was 30 December 2016 and according to the question I was 25 then.

3. Yesterday was 31 December 2016, which happens to be my birthday too (Woohoo!), and my age increases by one to become 26.

4. I will turn 27 on my birthday this year (31 December 2017).

5. I will turn 28 on my birthday next year (31 December 2018).

Now, if you read the question again, it will make more sense:

The day before yesterday(30 December 2016), I was 25 years old and next year(31 December 2018) I will be 28.

3608
Q:

The calendar for the year 2018 will be the same for the year

 A) 2023 B) 2027 C) 2029 D) 2022

Explanation:

How to find the years which have the same Calendars :

Leap year calendar repeats every 28 years.

Here 28 is distributed as 6 + 11 + 11.

Rules:

a) If given year is at 1st position after Leap year then next repeated calendar year is Givenyear+6.

b) If given year is at 2nd position after Leap year then next repeated calendar year is Givenyear+11.

c) If given year is at 3rd position after Leap year then next repeated calendar year is Givenyear+11.

Now, the given year is 2018

We know that 2016 is a Leap year.

2016    2017    2018    2019  2020

Lp Y      1st     2nd      3rd     Lp Y

Here 2018 is at 2 nd position after the Leap year.

According to rule b) the calendar of 2018 is repeated for the year is 2018 + 11 = 2029.