It is currently Wed Dec 19, 2018 6:38 am

 All times are UTC - 5 hours [ DST ]

 Page 1 of 1 [ 2 posts ]
 Print view Previous topic | Next topic
Author Message
 Post subject: GMAT SymbolsPosted: Sun Jun 26, 2011 6:57 pm

Joined: Sun May 30, 2010 3:15 am
Posts: 424
For positive integer values of n, the operation n# is defined as the sum of all integers from 1 to n, inclusive. For example, 4# = 1 + 2 + 3 + 4 = 10.
If 15# – 14# = k#, what is the value of k#?
A. 1
B. 4
C. 5
D. 14
E. 15

(E) The symbol # is a function. These types of functions are common on the GMAT. Using the definition of n#, we know that:
15# – 14# = (1 + 2 +…+ 15) – (1 + 2 +…+ 14) = 15.
So k# must equal 15, or choice (E).
----------
Although 15# – 14# = 15 what the problem asks is: 15# – 14# = k#
So, k# = 15 but k = 5 because k# =1 + 2 + 3 + 4 + 5 = 15
So, the right answer should be C.

Top

 Post subject: Re: GMAT SymbolsPosted: Sun Jun 26, 2011 6:59 pm

Joined: Sun May 30, 2010 2:23 am
Posts: 498
The question asks for the value of k#, NOT just k.
The value of k# is 15, which is the answer choice E.

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Page 1 of 1 [ 2 posts ]

 All times are UTC - 5 hours [ DST ]

#### Who is online

Users browsing this forum: No registered users and 2 guests

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum

Search for:
 Jump to:  Select a forum ------------------ GMAT    GMAT: Quantitative Section (Math)    GMAT: Verbal Section    GMAT: Integrated Reasoning    GMAT: General Questions GRE    GRE: Quantitative Reasoning (Math)    GRE: Verbal Reasoning    GRE: General Questions General questions    Other questions