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Type: Posts; User: dissa; Keyword(s):

by dissa
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6
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686

Ans a)
2. ## Thread: Is |x| + |x-1| = 1?

by dissa
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

by dissa
Replies
4
Views
862

### Yes. The OA is C :)

Yes. The OA is C :)

by dissa
Replies
4
Views
862

### Whimsical...

Whimsical

(A) Chivalrous
(B) Perfect
(C) Predictable
(D) Hidden
(E) Backward
6. ## Thread: A Couple of Hard Questions from a CAT Exam

by dissa
Replies
18
Views
26,475

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

yeah!! Thanks for the correction.I corrected it. :)
7. ## Thread: Power prep question

by dissa
Replies
6
Views
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. ## Thread: Power prep question

by dissa
Replies
6
Views
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. ## Thread: A Couple of Hard Questions from a CAT Exam

by dissa
Replies
18
Views
26,475

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

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

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. ## Thread: A Couple of Hard Questions from a CAT Exam

by dissa
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. ## Thread: A Couple of Hard Questions from a CAT Exam

by dissa
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)

by dissa
Replies
4
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1,284

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. ## Thread: two possible values of x

by dissa
Replies
6
Views
1,400

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

x4-25x2= -144

x4-25x2 + 144 = 0

x4 -16x2-9x2 +144 = 0

(x2 - 16) (x2 - 9) = 0