Suppose a DS 'value' question contains a variable X in the stem, and one of the statements is sufficient to give the answer as f(X). Would you say that the statement was sufficient to answer the question? Here is an example:
Jack can type at the rate of N words per minute. How many hours did it take Jack to finish typing the book?
(1) The book has 21600 words.
(2) If Jack typed any faster, he would finish the book before Jim
Now, (1) gives the answer as a function of N. Can we say (1) is sufficient? My thought is No. I am wondering what GMAC and GMAT instructor's think about this.
Jack can type at the rate of N words per minute. How many hours did it take Jack to finish typing the book?
(1) The book has 21600 words.
(2) If Jack typed any faster, he would finish the book before Jim
Now, (1) gives the answer as a function of N. Can we say (1) is sufficient? My thought is No. I am wondering what GMAC and GMAT instructor's think about this.
