S n T...

If S and T are non-zero numbers and (1/S)+(1/T)=S+T , which of the following is necessarily true?

1.ST=1
2.S+T=1
3.S/T=1
4.1/S=T
5. none of the above

source-gmatclub. pl explain...

soooo...easy.

thanks guru.

b/d...DS

Representation in a local community board is based on the community’s population, with 25 board members representing the first 500,000 people, and each additional board member representing an additional 30,000 people. Is the population of the town less than 500,000? (1) There were 23 members on th...

thanks rahul..!!!
i was not sure about is 0 isto be consider as sq and/or cube.

DS-integer sq/cube

If X is an integer, what is the value of X ?

1. X^2 = X^3

2. X is both a perfect square and a perfect cube.

Note: A perfect square is a number that has a whole number as its square root.

pl explain....thanks.

scores..

Q1: A test has 50 questions. A student scores 1 mark for a correct answer, –1/3 for a wrong answer, and –1/6 for not attempting a question. If the net score of a student is 32, the number of questions answered wrongly by that student cannot be less than 1. 6 2. 12 3. 3 4. 9 pl explain . thanks. ...

CR: college student.

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