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for example : november 9 , 1991

1990 = 1600 + 300 + 0

odd days in 1600 = 0 and in 300 = 1 .. hence we get total odd days in 1900 = 1

now calculate the total number of days from 1.1.1991 to 9.11.1991

@annas right?

Very niice :D

yes it is a very nice process also

useful process

O.o i m shocked ... but awesome

:) thanks

we can make a computer program on that

logic

yes .. can u?

i can try , i have to make an algorithm on that first. i'll try as soon as my website work is done

oh k

but i didnt get.......

what is ur date of birth .. i will take urs as an example

15 july 1992

ok so first of all :
1992 = 1600 + 300 + 2 right?

wait always we have to break into 1600 +........so on

yes it becomes easy

hence the day on 15 july 1992 = wednesday

got it ? @nitz

wait...

300........1 odd day??

yes

Number of odd days in 300 years = (5 x 3) =15/7 = remainder = 1 odd day.

got it?

leave it ........i am getting confused
anyways thank you,,,,,,,

http://www.indiabix.com/aptitude/calendar/formulas

this is a confusing topic
no problem

i learnt some simple tricks like 85^2,125^2......

85^2 = (90-5)^2 = 8100+25-900 = 8125-900 = 7225

well wait lemme show u the shortcut one also

\[85^{2}=?\]
firstly mutiply last two :5*5=25
then multiply first digit that is 8*9=72
so 7225

:D right

i have multiplied first digit with a digit exceeding it....8*9=72

125^2 = 5^2
12*13=156
15625 = 125^2

ya....

even for 11....
say 49*11 we have
9 as it is
4+9=13
i carry off and4+1=5
so 539

...i dont get it...

should i give u another example?

@lgbasallote so lemme take this as an example :
what is the day on 06-8-2012 ?
ok?

yeah sure

ok so 2011 = 1600 + 300 + 111 right ?

but you're looking for 2012...

yes but we will calculate odd days in 2011 years and then from 01-08-2012 to 06-08-2012

since 2012 is not a complete year hence we are taking 2011 there. . ok?

go on

wait i am making it soo long sorry

Made it short :D ..
well do you know the exact meaning of odd days?

well do you know understand what this concept is?
any more questions

what do you mean 0 odd days in 1600; 1 in 300 and 5 in 111

hint :
1 ordinary year = 52 weeks + 1 day
hence that 1 day is odd day =1

@mathslover can u expl this to me

No problem what is ur date of birth ?

ok . so
1995 = 1600 + 300 + 5
right?

oops wait it is :
1995 = 1600 + 300 + 95 right?

it is 1996

1996 is not a full year .. hence we will take 1995 there .. ok?

wat do u mean by full year

wat do u mean by full year

ok

got it @Yahoo! ?

u r correct....

thanks

@mathslover Any video on this topic

well not yet but lemme check it

sorry no .. @Yahoo!
http://www.indiabix.com/aptitude/calendar/
prefer this

Can you explain why the mayan calendar says the world is going to end this year?

well that are superstitions , only mayan calendar can explain sorry