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mayankdevnani Group Title

Solve this ONE :- Q-) Problem on SERIES. 6,20,36,48,50,?,0 a)36 b)40 c)46 d)56 Which number comes in place of "?" ?

  • one year ago
  • one year ago

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  1. mayankdevnani Group Title
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    @ash2326 @phi @UsukiDoll

    • one year ago
  2. INeedHelpPlease? Group Title
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    56?

    • one year ago
  3. mayankdevnani Group Title
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    how?

    • one year ago
  4. UsukiDoll Group Title
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    Ned Flanders

    • one year ago
  5. mayankdevnani Group Title
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    what?

    • one year ago
  6. mayankdevnani Group Title
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    @INeedHelpPlease? help me

    • one year ago
  7. RadEn Group Title
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    Tn = 7n^2 - n^3 T1 = 7(1)^2 - (1)^3 = 6 T2 = 7(2)^2 - (2)^3 = 20 .... ... T6 = 7(6)^2 - (6)^3 = 78 T7 = 7(7)^2 - (7)^3 = 0 so, it is T6 = 78

    • one year ago
  8. mayankdevnani Group Title
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    but it is not in options. @RadEn

    • one year ago
  9. mayankdevnani Group Title
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    i know this is also a answer but i need answer which is in options?

    • one year ago
  10. mayankdevnani Group Title
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    @hartnn can you help me ?

    • one year ago
  11. hartnn Group Title
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    how did u get Tn RadEn ?

    • one year ago
  12. SithsAndGiggles Group Title
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    @RadEn's reasoning checks out, his answer should be 36 though. \(7(6^2)-6^3=252-216=36\)

    • one year ago
  13. mayankdevnani Group Title
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    he makes the series to solve it. @hartnn

    • one year ago
  14. hartnn Group Title
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    yeah, i know how to find Tn, but i wanted to know whether RadEn used any different/simpler method....

    • one year ago
  15. mayankdevnani Group Title
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    his method is wrong.

    • one year ago
  16. hartnn Group Title
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    he got the answer which is in the choices, how u say its wrong ?

    • one year ago
  17. mayankdevnani Group Title
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    because if we put n=6,the answer comes to be is 36 but in actual(followed by series)the answer would be 50

    • one year ago
  18. mayankdevnani Group Title
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    isiliye mujhe lagta h ki voh galat h

    • one year ago
  19. hartnn Group Title
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    " in actual(followed by series)the answer would be 50" what does this even mean ?

    • one year ago
  20. mayankdevnani Group Title
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    iska matla agar hum uske tarike se follow karien to iska answer 50 aana chaihye series ke hisaab se lekin actual main 36 aa raha h..... iska method thode se hi digits ke liye apply hota h

    • one year ago
  21. mayankdevnani Group Title
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    now understood @hartnn bhaiya

    • one year ago
  22. hartnn Group Title
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    lol, i could translate that in hindi myself too

    • one year ago
  23. hartnn Group Title
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    why u say answer should be 50 ?

    • one year ago
  24. mayankdevnani Group Title
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    bhaiya , yeh question ntse 2013 RAJ. main poocha gaya tha aur FIITJEE vaalein bata rahein h ki iska answer DATA INADEQUATE h aur CAREER POINT vallein bata rahein h ki iska answer 36 h

    • one year ago
  25. mayankdevnani Group Title
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    to iska kya answer hoga bhaiya?

    • one year ago
  26. mayankdevnani Group Title
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    @hartnn

    • one year ago
  27. hartnn Group Title
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    the answer to this is indeed 36 as shown corretly by RadEn

    • one year ago
  28. mayankdevnani Group Title
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    okk...thank you,,, @hartnn and @RadEn

    • one year ago
  29. hartnn Group Title
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    i just wanted to know any simpler way of finding Tn :P

    • one year ago
  30. mayankdevnani Group Title
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    yeah...this logic doesn't apply in NTSE STAGE 1

    • one year ago
  31. mayankdevnani Group Title
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    i think there is another logic simpler logic for this

    • one year ago
  32. hartnn Group Title
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    i think it does apply, the third differences are constant

    • one year ago
  33. hartnn Group Title
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    |dw:1385197162928:dw|

    • one year ago
  34. hartnn Group Title
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    so, x - 52 - (-10) = -6

    • one year ago
  35. hartnn Group Title
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    x= 42 - 6 = 36

    • one year ago
  36. hartnn Group Title
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    @mayankdevnani @RadEn any simpler way to find Tn ?

    • one year ago
  37. RadEn Group Title
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    wolfram is simpler way , @hartnn hehehe :) why i cant see notification in OS ??

    • one year ago
  38. RadEn Group Title
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    http://www.wolframalpha.com/input/?i=6%2C20%2C36%2C48%2C50

    • one year ago
  39. hartnn Group Title
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    oh lol but i guess they can't use wolf.... so using the 3rd difference is a simpler manual way...

    • one year ago
  40. RadEn Group Title
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    yeah, just input some numbers in wolfram :)

    • one year ago
  41. hartnn Group Title
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    and nobody can see notifications its the bug OS admins are trying to fix

    • one year ago
  42. RadEn Group Title
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    ohhhh, thanks

    • one year ago
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