feb-12- gre- quants

feb-12- gre- quants

1. Given a series a1 , a2 . . . . . If an+1 = (an - 1)^2 - 1 and a1 = 2 then find a17?


2. A square edges are increased by 0.1 inch and if the increase in the area is 0.75 then what is the original edge of the square?
A.3.8
B 3.7
C 3.6
D 3.5
E. 3.4


3. Given.... p, q, r are prime numbers.
Col A: Factors of pqr (including) pqr and 1
Col B: 8


4. There was a diagram of quadrilateral (like trapezium), two base angles were given as 40degree & upper 3 sides were given of length x. Find the perimeter of that quadrilateral?
A.(4+root(2))x
B.(4+2*root(2))x


5. A Triangle was given with sides 5 ,6 and 8. Angle opposite to side 5 is 'x' and angle opposite to side 6 is 'y'.
Col A: x+y
Col B: 90


6. Given two points A (x1,y1) & B (x2,y2) such that x1y2
COl A: Slope of line AB
Col B: 0


7. There is a triangle which has all acute angles. If two sides of a triangle are given as 3, 4 then find the range of the third side x?







vattikonda



Joined: 09 Feb 2008
Posts: 16
Posted: Wed Feb 13, 2008 4:07 am Post subject: answers

Are the answers for the above questions

1)zero (0)
2)A 3)C 4)? 5)B 6)B 7) 1<=x<=7

can any body help out with question 4.

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icywarm



Joined: 09 Feb 2008
Posts: 15
Posted: Wed Feb 13, 2008 2:01 pm Post subject:

1. Given a series a1 , a2 . . . . . If an+1 = (an - 1)^2 - 1 and a1 = 2 then find a17?

==> 0


2. A square edges are increased by 0.1 inch and if the increase in the area is 0.75 then what is the original edge of the square?
A.3.8
B 3.7
C 3.6
D 3.5
E. 3.4

==> A


3. Given.... p, q, r are prime numbers.
Col A: Factors of pqr (including) pqr and 1
Col B: 8

COL B


4. There was a diagram of quadrilateral (like trapezium), two base angles were given as 40degree & upper 3 sides were given of length x. Find the perimeter of that quadrilateral?
A.(4+root(2))x
B.(4+2*root(2))x

Question is not very clear to me. But, you can divide the quadrilateral into 2 triangles and one rectangle in order to calculate the base of two triangles, which along with the base of rectangle, will give the fourth side of figure.


5. A Triangle was given with sides 5 ,6 and 8. Angle opposite to side 5 is 'x' and angle opposite to side 6 is 'y'.
Col A: x+y
Col B: 90

COL B


6. Given two points A (x1,y1) & B (x2,y2) such that x1y2
COl A: Slope of line AB
Col B: 0

COL B


7. There is a triangle which has all acute angles. If two sides of a triangle are given as 3, 4 then find the range of the third side x?

Less than 5?

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icywarm



Joined: 09 Feb 2008
Posts: 15
Posted: Wed Feb 13, 2008 2:07 pm Post subject:

By the way, how did you get the answer C for Number 3?

I was thinking:

Factors of PQR will give 3 numbers itself (i.e. P, Q R). According to question, next two numbers are PQR and 1. So, I added them up (3+1+1 = 5). Hence 5<8.

I would love to know how you got C.

Different minds work differently. Very interesting.

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vattikonda



Joined: 09 Feb 2008
Posts: 16
Posted: Wed Feb 13, 2008 2:47 pm Post subject:

ur answer is

Last edited by vattikonda on Wed Feb 13, 2008 2:59 pm; edited 1 time in total

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vattikonda



Joined: 09 Feb 2008
Posts: 16
Posted: Wed Feb 13, 2008 2:56 pm Post subject:

The number of factors is based on the prime factorization.

For instance, if x = p^n, where p is prime, then it has n+1 factors.

If x = p^n * q^m, where p and q are prime, then it has
(n + 1)(m + 1) factors

We can continue as far as we need.

36 = 2^2*3^2, so it has (2 + 1)(2 + 1) = 3*3 = 9 factors.

(To check:1, 2, 3, 4, 6, 9, 12 18, 36)

Minds work differently but logic remains same

Last edited by vattikonda on Wed Feb 13, 2008 3:01 pm; edited 1 time in total

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vattikonda



Joined: 09 Feb 2008
Posts: 16
Posted: Wed Feb 13, 2008 2:57 pm Post subject:

i think u asked for my exam date? its on feb18

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icywarm



Joined: 09 Feb 2008
Posts: 15
Posted: Wed Feb 13, 2008 3:09 pm Post subject:

Thats great. I appreciated it. I just registered for the test and I am taking on Feb 23. I couldn't get earlier date.

Just wondering if you want to discuss/share the stuff on yahoo messenger (as I see that you have yahoo msn on your profile) sometimes. I have one PDF file which I received from my friend. It may be be useful for you to prepare for verbal part. Another note- you should go through the BigBook RC. Guess what? I appeared for GRE last month and I couldn't do well as I was sick. Last night, I was going through the BigBook. To my greatest surprise, all RC were from the big book. So Yeah, do have a glance at them when you get a chance.

Its been snowing since last night..all classes got canceled today, and I guess good time to work on GRE inside the room. More GRE..More GRE....oh yeah!