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  1. Thread: Mass of material

    by dissa
    Replies
    6
    Views
    686

    Ans a)

    Ans a)
  2. Replies
    9
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    1,480

    IMO - yes. 0

    IMO - yes. 0<= X <=1
  3. Thread: If xy = 3, what

    by dissa
    Replies
    4
    Views
    1,268

    x-y =2 (x-y)^2 = 4 x^2+ y^2 -2xy =4 10 -2xy =...

    x-y =2
    (x-y)^2 = 4
    x^2+ y^2 -2xy =4
    10 -2xy = 4
    xy = 3

    x^2 + y^2 = (x+y)^2 - 2xy
    (x+y) = 16
    x+ y = +/- 4
  4. Thread: Whimsical...

    by dissa
    Replies
    4
    Views
    862

    Yes. The OA is C :)

    Yes. The OA is C :)
  5. Thread: Whimsical...

    by dissa
    Replies
    4
    Views
    862

    Whimsical...

    Whimsical

    (A) Chivalrous
    (B) Perfect
    (C) Predictable
    (D) Hidden
    (E) Backward
  6. Replies
    18
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    26,475

    yeah!! Thanks for the correction.I corrected it....

    yeah!! Thanks for the correction.I corrected it. :)
  7. Replies
    6
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    913

    Question is incomplete. That's why I've used "if"...

    Question is incomplete. That's why I've used "if" the tot # is x...:)
  8. Replies
    6
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    913

    If total # of students in the class is x; # of...

    If total # of students in the class is x;
    # of students took history class = y
    # of student didn't take class = x-y
    percentile = (x-y)/x x100 &#37;

    ans E
  9. Replies
    18
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    26,475

    hmm.. b/n between? I didn't get it. :) My...

    hmm.. b/n between? I didn't get it. :)

    My answer is here,
    h(n) = 2 x 4 x .....n
    h(100) = 2 x 4 x ...100
    h(100) + 1 = (2 x 4 x ...100 + 1) = 2^50 (1 x 2 x...50) +1

    if we divide this any...
  10. Replies
    18
    Views
    26,475

    @ Abhishek, x^2 = 9==> x = +/- sqrt (9) = +/-...

    @ Abhishek,

    x^2 = 9==> x = +/- sqrt (9) = +/- 3

    y^2 = (x^2)==> y = sqrt(x^2) =+/-x :)
    sqrt (x^2) = +/- x

    PS: keep in mind; when we take sqrt of anything there are two solutions(+ or -)!!
  11. Replies
    18
    Views
    26,475

    3.Ans (E) f(x) =-3x f(a)= -3a--(1) f(b)=...

    3.Ans (E)

    f(x) =-3x

    f(a)= -3a--(1)
    f(b)= -3b---(2)

    f(a+b)= -3 (a+b)

    (1) + (2)
  12. Replies
    4
    Views
    1,284

    Answer- 50% (D)

    Answer- 50&#37; (D)
  13. Thread: Please solve

    by dissa
    Replies
    5
    Views
    3,265

    If "a" is a positive interger; 30 x a

    If "a" is a positive interger;

    30 x a <= 360

    a <= 12

    # of multiples of 30 = 12

    The least common multiple for 30 & 12 = 60
  14. Replies
    6
    Views
    1,400

    Answer D x4-25x2= -144 x4-25x2 + 144 = 0...

    Answer D

    x4-25x2= -144

    x4-25x2 + 144 = 0

    x4 -16x2-9x2 +144 = 0

    (x2 - 16) (x2 - 9) = 0
  15. Thread: Ventriloquism

    by dissa
    Replies
    3
    Views
    732

    My answer also D. what is the OA?

    My answer also D. what is the OA?
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