TASK DEFINITION: This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
PROBLEM: Passage: There are fifteen fraternities and seven sororities at the University of Chicago, as well as one co-ed community service fraternity, Alpha Phi Omega. Four of the sororities are members of the National Panhellenic Conference, and ten of the fraternities form the University of Chicago Interfraternity Council. In 2002, the Associate Director of Student Activities estimated that 8–10 percent of undergraduates were members of fraternities or sororities. The student activities office has used similar figures, stating that one in ten undergraduates participate in Greek life.

SOLUTION: Along with 15 sororities, how many fraternities does the U of C have?

PROBLEM: Passage: A new generation of clubs such as Liverpool's Cream and the Ministry of Sound were opened to provide a venue for more commercial sounds. Major record companies began to open "superclubs" promoting their own acts. These superclubs entered into sponsorship deals initially with fast food, soft drinks, and clothing companies. Flyers in clubs in Ibiza often sported many corporate logos. A new subgenre, Chicago hard house, was developed by DJs such as Bad Boy Bill, DJ Lynnwood, DJ Irene, Richard "Humpty" Vission and DJ Enrie, mixing elements of Chicago house, funky house and hard house together. Additionally, Producers such as George Centeno, Darren Ramirez, and Martin O. Cairo would develop the Los Angeles Hard House sound. Similar to gabber or hardcore techno from the Netherlands, this sound was often associated with the "rebel" culture of the time. These 3 producers are often considered "ahead of their time" since many of the sounds they engineered during the late 20th century became more prominent during the 21st century.

SOLUTION: Where was a new type of club called Darren Located?

PROBLEM: Passage: At launch, the Xbox 360 was available in two configurations: the "Xbox 360" package (unofficially known as the 20 GB Pro or Premium), priced at US$399 or GB£279.99, and the "Xbox 360 Core", priced at US$299 and GB£209.99. The original shipment of the Xbox 360 version included a cut-down version of the Media Remote as a promotion. The Elite package was launched later at US$479. The "Xbox 360 Core" was replaced by the "Xbox 360 Arcade" in October 2007 and a 60 GB version of the Xbox 360 Pro was released on August 1, 2008. The Pro package was discontinued and marked down to US$249 on August 28, 2009 to be sold until stock ran out, while the Elite was also marked down in price to US$299.

SOLUTION:
What was the Xbox 360 Core package unofficially known as?