OG10 DS Quiz 12 2x
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Thorough review is critical to the learning process and for most people should take a significant amount of time (and effort!) potentially equally or surpassing the amount of time taken to do the question set.
- Redo questions that you got wrong or struggled on without looking at the answers or explanations. Think. Rethink. Push yourself. Put pen to paper. Don’t review with only your eyes!
- Once you’ve solved or if you aren’t able to solve in about 10 minutes carefully review the explanation (if provided). Again, put pen to paper and redo the question along with the explanation.
- If we haven’t provided an explanation or if our explanation didn’t clear up your doubts google the first few words of the question and confirm the solution on the GMAT forums.
- Except for CR and RC, take a screenshot and add it to your dropbox review folder so you can easily revisit the question when assigned review in your HW schedule.
- Bring questions that you still find difficult to QA or to our sessions. For sessions add the screenshots to the “review in session” folder in your dropbox.
Here’s a video outlining the review process: https://www.youtube.com/edit?o=U&video_id=X6k3niNoGuA
Question 1 of 13
Question 2 of 13
lf x and y are positive integers such that x = 8y + 12, what is the greatest common divisor of x and y?
(1) x = 12u, where u is an integer.
(2) y = 12z, where z is an integer.CorrectIncorrect
Question 3 of 13
lf the integer n is greater than1, is n equal to 2?
(1) n has exactly two positive factors.
(2) The difference of any two distinct positive factors of n is odd.CorrectIncorrect
Question 4 of 13
Is x > y?
(1) x = y + 2
(2) x/2 = y -1CorrectIncorrect
Question 5 of 13
Question 6 of 13
What is the average (arithmetic mean) of a, b, and c ?
(1) a + 2b + 3c = 10
(2) 3a + 2b + c = 14CorrectIncorrect
Question 7 of 13
If x is to be selected at random from set T, what is the probability that 1/4x – 5 ≤ 0?
(1) T is a set of 8 integers.
(2) T is contained in the set of integers from 1 to 25, inclusive.CorrectIncorrect
Question 8 of 13
Question 9 of 13
ls m ≠ n?
(1) m + n < 0
(2) mn < 0CorrectIncorrect
Question 10 of 13
Marta bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencils did Marta buy?
(1) Marta bought a total of 6 pencils.
(2) The total value of the pencils Marta bought was 130 cents.CorrectIncorrect
Question 11 of 13
lf r and s are nonzero integers, is r/s an integer?
(1) r – 1 = (s + 1)(s – 1)
(2) r – s = 20CorrectIncorrect
Question 12 of 13
lf n is an integer, is n/7 an integer?
(1) 3n/7 is an integer.
(2) 5n/7 is an integer.CorrectIncorrect
Question 13 of 13
A certain 4-liter solution of vinegar and water consists of x liters of vinegar and y liters of water. How many liters of vinegar does the solution contain?
(1) x/4 = 3/8
(2) y/4 = 5/8CorrectIncorrect