We invite you to test your GMAT knowledge for a chance to win! Each week, we will post a new Challenge Problem for you to attempt. If you submit the correct answer, you will be entered into that week’s drawing for a free Manhattan GMAT Prep item. Tell your friends to get out their scrap paper and start solving!

Here is this week’s problem:

For positive integers n, the integer part of the nth term of sequence A equals n, while the infinite decimal part of the nth term is constructed in order out of the consecutive positive multiples of n, beginning with 2n. For instance, A₁ = 1.2345678…, while A₂ = 2.4681012… The sum of the first seven terms of sequence A is between

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I love teaching, but I also love to travel. In 2009, I took a year off to travel around the world. And the thought that kept returning was, What would have been different in my life if I’d done this ten years ago? So Loop Abroad was born.

Loop is a high school travel program that brings students to Southeast Asia. Amidst traveling and volunteering, we connect students to with NGOs and other inspirational leaders who are passionate about what they do.

Two organizations we love are the Elephant Nature Foundation (ENF) and the Save Children in Asia Foundation (SCAO). The ENF is working to rescue and rehabilitate Asian elephants who have been abused in the logging and trekking industries. The Elephant Nature Park in Thailand is now home to almost 40 of these gentle giants. This year, the ENF has been granted a portion of a record-breaking one-million-acre wildlife preserve in Cambodia upon which elephants will be able to interact as if in the wild. This is a huge and exciting step toward replenishing the Asian elephant population. And because elephants require so much continuous land to thrive, replenishing their habitat means saving the habitats of thousands of other species and, in the process, preserving an entire ecosystem.

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Remember out immensely popular free Integrated Reasoning workshops from last month? Well, they’re back! Due to overwhelming student demand, we’ve added four more workshops, which you can now register for.

Sign up fast before they sell out!

Tuesday, May 8th (8:00 “ 10:00pm EST)
Instructor: Tommy Wallach

Saturday, May 19th (1:00 “ 3:00pm EST)
Instructor: Stephanie Moyerman

Monday, May 21st (8:00 “ 10:00pm EST)
Instructor: Whitney Garner

Saturday, June 2nd (1:00 “ 3:00pm EST)
Instructor: Stephanie Moyerman

We invite you to test your GMAT knowledge for a chance to win! Each week, we will post a new Challenge Problem for you to attempt. If you submit the correct answer, you will be entered into that week’s drawing for a free Manhattan GMAT Prep item. Tell your friends to get out their scrap paper and start solving!
Here is this week’s problem:

The expression x[n]y is defined for positive values of x and y and for positive integer values of n as follows:

1. x[1]y = x^y
2. If n is odd, x[n+1]y = (x[n]y)^x
3. If n is even, x[n+1]y = (x[n]y)^y

If y = ½ and x[4]y = 2, then x =

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We invite you to test your GMAT knowledge for a chance to win! Each week, we will post a new Challenge Problem for you to attempt. If you submit the correct answer, you will be entered into that week’s drawing for a free Manhattan GMAT Prep item. Tell your friends to get out their scrap paper and start solving!
Here is this week’s problem:

From 2008 to 2009, the number of Easter eggs in a certain egg hunt rose 20%, then fell 17% from 2009 to 2010. From 2008 to 2009, the ratio of Easter eggs to Easter bunnies in the same hunt fell 20%, then rose 22% from 2009 to 2010. By what approximate percent did the number of bunnies change over the full period from 2008 to 2010?

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In celebration of the release of our 5th Edition Strategy Guides, we’re giving away a complete set (10 books!) to one lucky person. For a chance to win the beautiful books you see to your left, head over to our Facebook page and “like” our post announcing the giveaway. We’ll pick one person at random Friday afternoon. If we get over 100 “likes”, we’ll give away a second set of books, so get as many people to “like” it as you can!

We’ll also be giving away a complete set of 5th Edition Strategy Guides on Twitter at some point this week, and in the next issue of our newsletter, GMATTERS, as well as a few other places online. Keep your eyes peeled for a chance to win! Or, if you can’t wait, head over to our store and pick up the books now and see how great they really are.

Update, 4/26/12: We’re giving away a set of 5th edition books on GMAT Club and Beat the GMAT. Post on the linked threads for a chance to win!

We are excited to announce the release of our new 5th Edition GMAT Strategy Guides! Months of intensive work by our 99th percentile instructors has resulted in what we believe are the finest GMAT prep books money can buy. The 10 5th Edition books (which amount to nearly 1,900 pages!) were designed with our content-based approach to prepare students for the most recent changes to the GMAT, including Integrated Reasoning. The 5th Edition Strategy Guides come with access to 6 free online practice exams as well as access to over 200 additional free practice questions in 9 subject-specific question banks.

Interested in learning more? Check out the individual book pages in our MGMAT Store. We’re also going to have a lot of great content and giveaways relating to the new 5th Edition guides on the blog this week so make sure you check back every day!

We invite you to test your GMAT knowledge for a chance to win! Each week, we will post a new Challenge Problem for you to attempt. If you submit the correct answer, you will be entered into that week’s drawing for a free Manhattan GMAT Prep item. Tell your friends to get out their scrap paper and start solving!
Here is this week’s problem:

Ror positive integer m, the m-th heptagonal number is given by the formula 5m² “ 3m)/2. For positive integer n, the n-th triangular number is the sum of the first n positive integers. Which of the following is true for k, the smallest triangular number that is also heptagonal?

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Manhattan Prep is pleased to announce its Complete Crash Course, an intensive 9-day sprint through the complete GMAT curriculum.

Do you have a GMAT test date booked before the exam changes on June 5th?

Would you benefit from exposure to Manhattan GMAT’s full curriculum beforehand?

If so, this course may be just the structure you need to organize your next couple weeks of studying.

This course is not for the faint of heart or for those expecting miraculous, 150-point score improvements in two weeks. If you learn very quickly and have the GMAT basics already mastered, then allow Manhattan GMAT a chance to take your studying to the next level.

Learn more here.

On February 3rd, the team at Manhattan Prep joined together and wore red for the National Wear Red Day. This annual event is sponsored by the American Heart Association. Additionally, Manhattan Prep held its first Give A Heart drive. Throughout the month of February, Instructors and staff donated money towards the purchase of paper hearts. All funds were donated to the America Heart Association.

Manhattan Prep is a proud supporter of heart health, in addition to overall wellness. The company promotes an active and healthy life-style, encouraging employees to participate in company exercise initiatives and organizing healthy lunch programs each month. We are proud to support such a wonderful cause. Thanks to all that were involved!