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**1,800 Practice Math Questions**

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GMAT Official Guide, with IR

OG Math | OG Verbal

OG12 & Quant Rev solutions!

**GMAT Question of the Day**

Beginner's Guide to the GMAT

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## GMAT Question of the Day

###### April 18, 2014

Every weekday, GMAT Hacks publishes a realistic GMAT practice question. In general, you'll see Quant problems on Monday, Wednesday, and Friday, and Verbal questions on Tuesday and Thursday. You'll always be able to find them at www.gmathacks.com/daily.

Give today's question a try, and check your answer. When you're done, be sure to subscribe so that you can keep practicing every day!

**Today's Practice GMAT Question:**

If xyz < 0 and yz > 0, which of the following must be positive? | |

(A) | xy |

(B) | xz |

(C) | (x^2)yz |

(D) | x(y^2)z |

(E) | xy(z^2) |

Click to show answer (opens in new window)

**Need more work in this area?** Check out the **Algebra: Challenge** set of (100) practice problems.There is also a full chapter covering Exponents in Total GMAT Math. It includes additional practice problems, as well.

If you don't already subscribe to the GMAT Question of the Day, start now--it's easy! A new question is published every weekday. You can sign up for all the questions, or just Verbal or Quantitative questions. Click here to subscribe!

**About the author:** *Jeff Sackmann has written many
GMAT preparation books, including the popular Total GMAT Math,
Total GMAT Verbal, and GMAT 111. He has also created
explanations for problems in The Official Guide, as well as
1,800 practice GMAT math questions.*

Total GMAT Math
The comprehensive guide to the GMAT Quant section. It's "far and away the best study material
available," including over 300 realistic practice questions and more than 500 exercises! |