Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Example 6. Is the sum of six consecutive integers even?

1. The first integer is odd
2. The average of six integers is odd
Watch out for Yes/No data sufficiency questions; they are the hardest and the most misleading.
Example 6: The answer to this one is D. (1) Statement says that the sum of the integers is odd, which gives a NO answer to our question, but is SUFFICIENT to give an answer, therefore sufficient. (2) Says that the sum is odd, which is sufficient to give a Yes answer. In both cases it was sufficient to answer the question, except in the first case, the answer was NO and in the other, it was YES. Make sure you don't confuse No with insufficient because they are not related here.

(1) appears to be sufficient; however, I can't find an example of (2 -The average of six integers is odd) even existing. Thoughts? Also do people know if in general with DS questions if (1) and (2) can both have distinct answers and still be sufficient? Thanks

Example 6. Is the sum of six consecutive integers even?

1. The first integer is odd 2. The average of six integers is odd Watch out for Yes/No data sufficiency questions; they are the hardest and the most misleading. Example 6: The answer to this one is D. (1) Statement says that the sum of the integers is odd, which gives a NO answer to our question, but is SUFFICIENT to give an answer, therefore sufficient. (2) Says that the sum is odd, which is sufficient to give a Yes answer. In both cases it was sufficient to answer the question, except in the first case, the answer was NO and in the other, it was YES. Make sure you don't confuse No with insufficient because they are not related here.

(1) appears to be sufficient; however, I can't find an example of (2 -The average of six integers is odd) even existing. Thoughts? Also do people know if in general with DS questions if (1) and (2) can both have distinct answers and still be sufficient? Thanks

Let me start this one off.

My answer is A. However,

Just from the question stem, by definition we know that the sum of 6 consecutive integers will always be odd

So I am not sure how to use the 2 statements since the question stem itself tells us the sum will never be Even

St: 1
First integer is Odd. So,

O+E+O+E+O+E --->O+E is always Odd so the sum is Always Odd.

So I guess it is suff.

We can also try pluggin in value -2, -1, 0, 1, 2, 3 etc.

St.2

Average of 6 consecutive integers is Odd.

We know,

Sum/6 = Odd----> which means Sum = 6*Odd---> Even,

However,

The sum can never be Even. Try plugging in values.

Also the average will never be a integer will be a fraction which when rounded up will be either Odd or Even

For some reason I believe that there is something wrong with the question at least with St.2

B/c we determine from the stem itself that the sum will always be Odd.

Re: Question on DS help page, Example 6 [#permalink]

Show Tags

14 Jun 2006, 09:44

Alanjackson wrote:

Example 6. Is the sum of six consecutive integers even?

1. The first integer is odd 2. The average of six integers is odd

Example 6: The answer to this one is D.

(1) Statement says that the sum of the integers is odd, which gives a NO answer to our question, but is SUFFICIENT to give an answer, therefore sufficient. (2) Says that the sum is odd, which is sufficient to give a Yes answer. In both cases it was sufficient to answer the question, except in the first case, the answer was NO and in the other, it was YES. Make sure you don't confuse No with insufficient because they are not related here.

It appears that (2) is not possible; however if it were some how possible, it would be sufficient. Is that what you all are thinking? Thanks

st 2 alone is perfectly ok, nothing wrong, and is possible. . but if we combine 1 and 2 with the information given in the question, 1 and 2 donot go togather.

st 2 means, sum of 6 consecutive integers is 6 times the average (the avg. could be 1 or 3 or 5 or 7 or so on). from 2, the total is even where as from 1 the total is odd.