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mathslover

Calendar concept ..

  • one year ago
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  1. mathslover
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    @annas and @angela210793

    • one year ago
  2. mathslover
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    for example : november 9 , 1991

    • one year ago
  3. mathslover
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    1990 = 1600 + 300 + 0

    • one year ago
  4. mathslover
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    odd days in 1600 = 0 and in 300 = 1 .. hence we get total odd days in 1900 = 1

    • one year ago
  5. mathslover
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    now calculate the total number of days from 1.1.1991 to 9.11.1991

    • one year ago
  6. mathslover
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    since 1991 is not a leap year hence we have days in february = 28 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 9 = 313 divide that by 7 we get remainder = 5 hence total number of odd days = 1 + 5 = 6

    • one year ago
  7. mathslover
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    Monday Tuesday Wednesday Thursday Friday Saturday Sunday 1 2 3 4 5 6 7 total number of odd days = 6 hence on 9 november 1991 it was saturday

    • one year ago
  8. mathslover
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    @annas right?

    • one year ago
  9. angela210793
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    Very niice :D

    • one year ago
  10. mathslover
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    yes it is a very nice process also

    • one year ago
  11. mathslover
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    useful process

    • one year ago
  12. annas
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    O.o i m shocked ... but awesome

    • one year ago
  13. mathslover
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    :) thanks

    • one year ago
  14. annas
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    we can make a computer program on that

    • one year ago
  15. annas
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    logic

    • one year ago
  16. mathslover
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    yes .. can u?

    • one year ago
  17. annas
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    i can try , i have to make an algorithm on that first. i'll try as soon as my website work is done

    • one year ago
  18. mathslover
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    oh k

    • one year ago
  19. nitz
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    but i didnt get.......

    • one year ago
  20. mathslover
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    what is ur date of birth .. i will take urs as an example

    • one year ago
  21. nitz
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    15 july 1992

    • one year ago
  22. mathslover
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    ok so first of all : 1992 = 1600 + 300 + 2 right?

    • one year ago
  23. nitz
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    wait always we have to break into 1600 +........so on

    • one year ago
  24. mathslover
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    yes it becomes easy

    • one year ago
  25. mathslover
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    wait we will take 1991 here: 1991 = 1600+300+1 1600 = 0 odd days 300 = 1 odd day 1 = 1 odd day now calculate the number of days from 1.1.1992 to 15.07.1992 31+29+31+30+31+30+15 = 197 divide 197 by 7 remainder = 1 hence total number of odd days = 1 + 1 + 1 = 3

    • one year ago
  26. mathslover
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    hence the day on 15 july 1992 = wednesday

    • one year ago
  27. mathslover
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    got it ? @nitz

    • one year ago
  28. nitz
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    wait...

    • one year ago
  29. nitz
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    300........1 odd day??

    • one year ago
  30. mathslover
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    yes

    • one year ago
  31. mathslover
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    Number of odd days in 300 years = (5 x 3) =15/7 = remainder = 1 odd day.

    • one year ago
  32. mathslover
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    we can write 300 = (100)*3 number of odd days in 100 = 5 and hence in 300 it will be 5*3 = 15 / 7 remainder = 1

    • one year ago
  33. mathslover
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    got it?

    • one year ago
  34. mathslover
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    100 years = 76 ordinary years + 24 leap years = (76 x 1 + 24 x 2) odd days = 124 odd days. = (17 weeks + days) 5 odd days. Number of odd days in 100 years = 5.

    • one year ago
  35. nitz
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    leave it ........i am getting confused anyways thank you,,,,,,,

    • one year ago
  36. mathslover
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    http://www.indiabix.com/aptitude/calendar/formulas

    • one year ago
  37. mathslover
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    this is a confusing topic no problem

    • one year ago
  38. nitz
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    i learnt some simple tricks like 85^2,125^2......

    • one year ago
  39. mathslover
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    85^2 = (90-5)^2 = 8100+25-900 = 8125-900 = 7225

    • one year ago
  40. mathslover
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    well wait lemme show u the shortcut one also

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

    • one year ago
  42. mathslover
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    :D right

    • one year ago
  43. nitz
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    i have multiplied first digit with a digit exceeding it....8*9=72

    • one year ago
  44. mathslover
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    125^2 = 5^2 12*13=156 15625 = 125^2

    • one year ago
  45. nitz
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    ya....

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

    • one year ago
  47. lgbasallote
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    ...i dont get it...

    • one year ago
  48. mathslover
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    should i give u another example?

    • one year ago
  49. mathslover
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    @lgbasallote so lemme take this as an example : what is the day on 06-8-2012 ? ok?

    • one year ago
  50. lgbasallote
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    yeah sure

    • one year ago
  51. mathslover
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    ok so 2011 = 1600 + 300 + 111 right ?

    • one year ago
  52. lgbasallote
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    but you're looking for 2012...

    • one year ago
  53. mathslover
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    yes but we will calculate odd days in 2011 years and then from 01-08-2012 to 06-08-2012

    • one year ago
  54. mathslover
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    since 2012 is not a complete year hence we are taking 2011 there. . ok?

    • one year ago
  55. lgbasallote
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    go on

    • one year ago
  56. mathslover
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    wait i am making it soo long sorry

    • one year ago
  57. mathslover
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    ok so .. 2011 = 1600 + 300 + 100+10+1 odd days in 1600 = 0 , in 300 = 1 and in 111= 5 now : count the total number of days from 1.1.2012 to 6.8.2012 : 31+29+31+30+31+30+31+6 = 219 divide 219 by 7 : we get remainder as 2 hence total number of odd days : 5 + 1 + 2 = 6 + 2 = 8 now : 8 days / 7 = remainder = 1 hence finally 1 odd day that denotes that the day on 06.08.2012 is monday monday

    • one year ago
  58. mathslover
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    Made it short :D .. well do you know the exact meaning of odd days?

    • one year ago
  59. mathslover
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    well do you know understand what this concept is? any more questions

    • one year ago
  60. lgbasallote
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    what do you mean 0 odd days in 1600; 1 in 300 and 5 in 111

    • one year ago
  61. mathslover
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    hint : 1 ordinary year = 52 weeks + 1 day hence that 1 day is odd day =1

    • one year ago
  62. Yahoo!
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    @mathslover can u expl this to me

    • one year ago
  63. mathslover
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    No problem what is ur date of birth ?

    • one year ago
  64. mathslover
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    ok . so 1995 = 1600 + 300 + 5 right?

    • one year ago
  65. mathslover
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    oops wait it is : 1995 = 1600 + 300 + 95 right?

    • one year ago
  66. Yahoo!
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    it is 1996

    • one year ago
  67. mathslover
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    1996 is not a full year .. hence we will take 1995 there .. ok?

    • one year ago
  68. Yahoo!
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    wat do u mean by full year

    • one year ago
  69. Yahoo!
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    wat do u mean by full year

    • one year ago
  70. Yahoo!
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    @mathslover

    • one year ago
  71. mathslover
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    full year means that : 365 days in 1996 you dont have 365 days as ur birthday is on 11 - 03 .. got it?

    • one year ago
  72. Yahoo!
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    ok

    • one year ago
  73. mathslover
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    now no. of odd days in 1600 =0 in 300 = 1 and in 95 =6 count days from 1.1.1996 to 11.03.1996 31+29+11 = 71 71/7 = remainder = 1 total odd days = 6+1+1 = 8 hence on 11.03.1996 it was monday

    • one year ago
  74. mathslover
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    95/4 = 23 .. hence 95 years = 23 leap years + 72 ordinary years odd days in 95 years = 23*2 + 72*1=46+72 = 118 118/7 = remainder = 6

    • one year ago
  75. mathslover
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    got it @Yahoo! ?

    • one year ago
  76. Yahoo!
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    u r correct....

    • one year ago
  77. mathslover
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    thanks

    • one year ago
  78. Yahoo!
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    @mathslover Any video on this topic

    • one year ago
  79. mathslover
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    well not yet but lemme check it

    • one year ago
  80. mathslover
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    sorry no .. @Yahoo! http://www.indiabix.com/aptitude/calendar/ prefer this

    • one year ago
  81. mathslover
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    good question : for example : 1 ordinary year has 365 days there are totally 52 weeks and 1 day .. that 1 day is called odd day

    • one year ago
  82. RyanL.
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    Can you explain why the mayan calendar says the world is going to end this year?

    • one year ago
  83. mathslover
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    well that are superstitions , only mayan calendar can explain sorry

    • one year ago
  84. ParthKohli
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    @RyanL. It has been assumed that the world will end just because 2012 is the last year mentioned in Mayan Calendar.

    • one year ago
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