Aptitude - Calendar - Discussion
Discussion Forum : Calendar - General Questions (Q.No. 1)
1.
It was Sunday on Jan 1, 2006. What was the day of the week Jan 1, 2010?
Answer: Option
Explanation:
On 31st December, 2005 it was Saturday.
Number of odd days from the year 2006 to the year 2009 = (1 + 1 + 2 + 1) = 5 days.
On 31st December 2009, it was Thursday.
Thus, on 1st Jan, 2010 it is Friday.
Discussion:
259 comments Page 2 of 26.
Pradyumna Sinha said:
3 years ago
@ Sundar.
Thank you for giving a good explanation.
Thank you for giving a good explanation.
(23)
Sai said:
1 year ago
Solution:
Day = date+ month code + year code +no.of normal years + no.of leap years-1/7
01 + 01 + 06 + 10 + 10/4 - 4 = 7 - 1 = 6.
6 is Friday,
Day = date+ month code + year code +no.of normal years + no.of leap years-1/7
01 + 01 + 06 + 10 + 10/4 - 4 = 7 - 1 = 6.
6 is Friday,
(21)
Calnd said:
4 years ago
@All.
Here is the clarification.
Most of us have no prob in calculating no. Off odd days.
But confusion is there when considering the day code.
Simple;
1jan 2000 -sundays.
To
1jan 2006.
Odd days = 6.
2006 = 1.
2007 = 1.
2008 = 2.
2009 = 1.
1 jan 2006 so one day =one odd day.
Total=6
Odd day=7-6=1.
Starting day is sunday so again start from sunday then keep increasing by one
For odd 2=
1 = Monday,
2 = Tuesdays .
So on.
Here is the clarification.
Most of us have no prob in calculating no. Off odd days.
But confusion is there when considering the day code.
Simple;
1jan 2000 -sundays.
To
1jan 2006.
Odd days = 6.
2006 = 1.
2007 = 1.
2008 = 2.
2009 = 1.
1 jan 2006 so one day =one odd day.
Total=6
Odd day=7-6=1.
Starting day is sunday so again start from sunday then keep increasing by one
For odd 2=
1 = Monday,
2 = Tuesdays .
So on.
(15)
Kets said:
4 years ago
@All.
Leap year means February has 29 days.
The last leap year was 2020.
Leap year comes every 4 years.
Eg;
2004, 2008, 2012,2016,2020,2024.
Leap year means February has 29 days.
The last leap year was 2020.
Leap year comes every 4 years.
Eg;
2004, 2008, 2012,2016,2020,2024.
(12)
Dancan said:
9 months ago
Here Explanations are great. Thanks.
(12)
Hitesh Handke said:
6 months ago
365 + 366 + 365 + 365 + 1 = 1461.
1461%7 = 5 and 5 it means Friday.
1461%7 = 5 and 5 it means Friday.
(12)
Monir said:
4 years ago
Thanks everyone for explaining.
(10)
Lakshmi said:
5 years ago
How do we know the leap year of that specific year? How to know? Please explain.
(7)
Ontela Bharath said:
3 months ago
From 2006-2009.
There is one leap year and 3 ordinary years
So, 1 * 2 + 3 * 1 = 5.
5 means Thursday, i.e December 31st 2009
So,2010 Jan 1st is a Friday
There is one leap year and 3 ordinary years
So, 1 * 2 + 3 * 1 = 5.
5 means Thursday, i.e December 31st 2009
So,2010 Jan 1st is a Friday
(6)
SANDIP Manware said:
6 years ago
Month code for ordinary year 144 025 036 146.
Formula to find day = date + month code + last 2 digit of year + last 2 digit/4 ......note- take only whole number not after decimal.
Ex.. 15 Aug 1989.
15 + 3 + 89+ (89/4).
15 +3+ 89+22..........89/4=22.xxxx
= 129.
Divide 129 by 7.
129/7 = The remainder will be 3.
Then sunday =1
Monday=2
Tuesday=3
Wednesday=4
Thursday=5
Friday=6
Saturday=00
Aur remainder is 3 then answer will be Tuesday.
Pls, remember.
For 1900 series add in addition = 00
For series 2000 add +6
For series 2100 add +4
For series 2200 add +2
For series 2300 add +00
For series 1800 add +02
For series 1700 add +04
For series 1600 add +06
Formula to find day = date + month code + last 2 digit of year + last 2 digit/4 ......note- take only whole number not after decimal.
Ex.. 15 Aug 1989.
15 + 3 + 89+ (89/4).
15 +3+ 89+22..........89/4=22.xxxx
= 129.
Divide 129 by 7.
129/7 = The remainder will be 3.
Then sunday =1
Monday=2
Tuesday=3
Wednesday=4
Thursday=5
Friday=6
Saturday=00
Aur remainder is 3 then answer will be Tuesday.
Pls, remember.
For 1900 series add in addition = 00
For series 2000 add +6
For series 2100 add +4
For series 2200 add +2
For series 2300 add +00
For series 1800 add +02
For series 1700 add +04
For series 1600 add +06
(3)
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