[nuttyvarun]

Originally Posted by akhanna

Hello everyone,

How's it going? I am new to pagalguy.com and was wondering if you could help me out a little. I have attached a file (sorry for the inconvenience, but I needed the triangle from the question), whose solution I am unable to understand.

Can anyone help me out here??

the answer must be eqn 1 alone..i.e. option A

BCD and ADB be 2 diff triangles..

in triangle BCD
angBDC = angBCD = 2x
thus, angDBC = (180 - 2x) >> eqn(1)

in triangle ADB
angDAB = x
and owing to eqn eqn(1) above, andBDA = 180 - 2x
thus angABD = x

thus side AD = BD >> eqn(2)

per question, side DB = DC

thus we have AD = DB = BC = 6

hence answer is option A

hope that helps

[siddharthaduggirala]

Originally Posted by akhanna

Hello everyone,

How's it going? I am new to pagalguy.com and was wondering if you could help me out a little. I have attached a file (sorry for the inconvenience, but I needed the triangle from the question), whose solution I am unable to understand.

Can anyone help me out here??

IMO A. here my explanation

In the figure AD=BD since Angle A and Angle B are equal and BD=BC since angle D is equal to angle C.

Consider 1) AD=6 from this we get BC =6 hence suff.

Consider 2) this does not talk abt length and talks abt angles.So insuff.

Hence A Whats the OA?

[siddharthaduggirala]

How many integers n are there such that
r < n < s?
(1) s – r = 5
(2) r and s are not integers.

[siddharthaduggirala]

If P,Q,R,S are positive inters , and P/Q=R/S , Is R is divisible by 5?

i.p is divisible by 140
ii.Q= 7^x , where x is positive integer

[siddharthaduggirala]

In the xy plane, at what two points does the graph of y= (x+a)(x+b) intersect the x axis?
(1) a+b=-1
(2) the graph intersects the x=axis at at (0,6)

[siddharthaduggirala]

Is 1/r>1?
(1) pqr>1
(2) pqr^2>1

[siddharthaduggirala]

In the rectangular coordinate system, are the points (a, b) and (c, d) equidistant from the origin?

(1) a/b = c/d

(2) Square root of (a^2) + Square root of (b^2) = Square root of (c^2) + square root of (d^2).

[nuttyvarun]

@siddharthaduggirala
seems someone opened the DS book after a very looooooooooooooong time

[nuttyvarun]

Originally Posted by siddharthaduggirala

How many integers n are there such that

r < n < s?
(1) s – r = 5

(2) r and s are not integers.

I would have marked it as option C

(1) s – r = 5
number types for s & r are not defined..


(2) r and s are not integers.

doesnt help at all

taking both together.. the problem gets resolved
take examples like below;
8.1 - 3.1 = 5.0
intergers in between are: 8,7,6,5,4 & 3 = count = 6

99.9 - 94.9 = 5
intergers in between are: 99,98,97,96,95 & 94 = count = 6

take fraction;
20/3 - 5/3 = 15/3 = 5
20/3 = 6.67
5/3 = 1.67
interger in between are: 6,5,4,3,2 & 1 = count = 6

so option C.. wat is the OA??

[nuttyvarun]

Originally Posted by siddharthaduggirala

In the xy plane, at what two points does the graph of y= (x+a)(x+b) intersect the x axis?

(1) a+b=-1

(2) the graph intersects the x=axis at at (0,6)

y= (x+a)(x+b)
y = x^2 + (a+b)x + ab

Eqn1:
a+b = -1 = slope of the line

line be; y = mx + C
m = -1
y = -x + C

Eqn2:
y intercept is @ 6

wat next.. I dunno.. wait for some guru..

I would have marked option E..not sure why or why not