[nairpraveenk]

Some fundoo problems....
--------------------------------

8x(y^3) + 8 (x^3)y = [2(x^2)(y^2)] / [2^(-3)]

What is xy?

(1) y>x
(2) x<0

(A) Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
(B) Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
(C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
(D) Each statement ALONE is sufficient.
(E) Statements (1) and (2) TOGETHER are NOT sufficient.

[ess_a]

Originally Posted by nairpraveenk

Some fundoo problems....
--------------------------------

8x(y^3) + 8 (x^3)y = [2(x^2)(y^2)] / [2^(-3)]

What is xy?

(1) y>x
(2) x<0

(A) Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
(B) Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
(C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
(D) Each statement ALONE is sufficient.
(E) Statements (1) and (2) TOGETHER are NOT sufficient.

On solving:
Either xy=0 OR x=y.

So i think none of the statements is required.. As in both the cases (y>x or x<0), xy=0.
OR maybe we can say that both are independently sufficient..

[sledgehammer]

I am stuck with this...... ??: :( :( :(

844.The use of gravity waves, which do not interact with matter in the way
electromagnetic waves do, hopefully will enable astronomers to study the actual
formation of black holes and neutron stars.

(A) in the way electromagnetic waves do, hopefully will enable
(B) in the way electromagnetic waves do, will, it is hoped, enable
(C) like electromagnetic waves, hopefully will enable
(D) like electromagnetic waves, would enable, hopefully
(E) such as electromagnetic waves do, will, it is hoped, enable

[mucool]

Originally Posted by sledgehammer

I am stuck with this...... ??: :( :( :(

844.The use of gravity waves, which do not interact with matter in the way
electromagnetic waves do, hopefully will enable astronomers to study the actual
formation of black holes and neutron stars.

(A) in the way electromagnetic waves do, hopefully will enable
(B) in the way electromagnetic waves do, will, it is hoped, enable
(C) like electromagnetic waves, hopefully will enable
(D) like electromagnetic waves, would enable, hopefully
(E) such as electromagnetic waves do, will, it is hoped, enable

I will go for A
c & d are out...'do' is missing....b & d, wordy...'it is hoped'...not crisp...
my bet A...
tho on a second look...hopefully shud not come first...still A

[mucool]

Originally Posted by nairpraveenk

Some fundoo problems....
--------------------------------

8x(y^3) + 8 (x^3)y = [2(x^2)(y^2)] / [2^(-3)]

What is xy?

(1) y>x
(2) x<0

(A) Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
(B) Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
(C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
(D) Each statement ALONE is sufficient.
(E) Statements (1) and (2) TOGETHER are NOT sufficient.

on solving, xy=0 or x=y

from 1. y>x....so x is not = y
therefore, xy=0 ......sufficient

2. x<0 .......y can be 0 or y and x both can be negative....no unique answer possible..

so I wud go for A...1 is sufficient...

[mucool]

wot say praveen??

[nairpraveenk]

Originally Posted by mucool

on solving, xy=0 or x=y

from 1. y>x....so x is not = y
therefore, xy=0 ......sufficient

2. x<0 .......y can be 0 or y and x both can be negative....no unique answer possible..

so I wud go for A...1 is sufficient...

Absolutely correct

[nairpraveenk]

Originally Posted by ess_a

On solving:
Either xy=0 OR x=y.

So i think none of the statements is required.. As in both the cases (y>x or x<0), xy=0.
OR maybe we can say that both are independently sufficient..

Oops essa, unfortunately, ur analysis is wrong. Look @ mukul's post. He has given the wright solution.

[nairpraveenk]

Originally Posted by sledgehammer

I am stuck with this...... ??: :( :( :(

844.The use of gravity waves, which do not interact with matter in the way
electromagnetic waves do, hopefully will enable astronomers to study the actual
formation of black holes and neutron stars.

(A) in the way electromagnetic waves do, hopefully will enable
(B) in the way electromagnetic waves do, will, it is hoped, enable
(C) like electromagnetic waves, hopefully will enable
(D) like electromagnetic waves, would enable, hopefully
(E) such as electromagnetic waves do, will, it is hoped, enable

I guess 'A' is the answer.

[nairpraveenk]

Fundoo problem
-------------------

Train A leaves New York for Boston at 3 PM and travels at the constant speed of 100 mph. An hour later, it passes Train B, which is making the trip from Boston to New York at a constant speed. If Train B left Boston at 3:50 PM and if the combined travel time of the two trains is 2 hours, what time did Train B arrive in New York?
(1) Train B arrived in New York before Train A arrived in Boston.

(2) The distance between New York and Boston is greater than 140 miles.

(A) Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
(B) Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
(C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
(D) Each statement ALONE is sufficient.
(E) Statements (1) and (2) TOGETHER are NOT sufficient.