Nowhere in the passage is mentioned that the weight reduction and exercise are the most effective methods. It just says that "Levels of HDL in the bloodstream are increased by a program of regular exercise and weight reduction" .. And that too, according to the passage, applies to "So...

Certain oil Companies.

Certain oil companies have been called poor corporate citizens because they have opposed government action to limit global warming by undermining scientific research that characterizes the issue as severe. However, these same oil companies have also invested millions of dollars in scientific researc...

C cannot be correct. The passage says, "adolescents who play video games on a regular basis are three times as likely to develop carpal tunnel syndrome as are adolescents who do not play video games." It can be implied that "Adolescents who do not play video games also can develop car...

Yes, You will have to buy them.

http://www.manhattangmat.com/Store.cfm

I go for E.

I looked out for :

a) an option that used "Such as" instead of "Like"
b) an option that used "unambiguous pronoun". "they" in all other options is ambiguous. Not clear whether "they" refers to the factories or the workers.

I don't think so.

"an unanticipated rise" should be singular.

I think your rules are correct. But you applied it wrongly.

In this particular question, Your Rule 2 needs to be applied.

2 ^ (4-1)^2
=> 2^3^2

=> 2^9.

For your 4th Question, x and y are not integers. so x and y can even be positive or negative numbers. In both (1) and (2) information about x and y are given in terms of x+y and x-y. Note that x and y can take any number of values to satisfy both (1) and (2). (1) and (2), either individually or take...