Interstate 10, which runs southeast to northwest through town, connects Tucson to Phoenix to the northwest on the way to its western terminus in Santa Monica, California, and to Las Cruces, New Mexico and El Paso, Texas toward its eastern terminus in Jacksonville, Florida. I-19 runs south from Tucson toward Nogales and the U.S.-Mexico border. I-19 is the only Interstate highway that uses "kilometer posts" instead of "mileposts", although the speed limits are marked in miles per hour instead of kilometers per hour.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which interstate is the only one that uses kilometer posts instead of mileposts?
Ah, so.. I-19

Over 600,000 students are enrolled in New York City's over 120 higher education institutions, the highest number of any city in the United States, including over half million in the City University of New York (CUNY) system alone in 2014. In 2005, three out of five Manhattan residents were college graduates, and one out of four had a postgraduate degree, forming one of the highest concentrations of highly educated people in any American city. New York City is home to such notable private universities as Barnard College, Columbia University, Cooper Union, Fordham University, New York University, New York Institute of Technology, Pace University, and Yeshiva University. The public CUNY system is one of the largest universities in the nation, comprising 24 institutions across all five boroughs: senior colleges, community colleges, and other graduate/professional schools. The public State University of New York (SUNY) system also serves New York City, as well as the rest of the state. The city also has other smaller private colleges and universities, including many religious and special-purpose institutions, such as St. John's University, The Juilliard School, Manhattan College, The College of Mount Saint Vincent, The New School, Pratt Institute, The School of Visual Arts, The King's College, and Wagner College.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What fraction of Manhattan residents graduated from college?
Ah, so.. three out of five

Football and cycling are the most popular sports in Eritrea. In recent years, Eritrean athletes have also seen increasing success in the international arena. Zersenay Tadese, an Eritrean athlete, currently holds the world record in half marathon distance running. The Tour of Eritrea, a multi-stage international cycling event, is held annually throughout the country. The Eritrea national cycling team has experienced a lot of success, winning the continental cycling championship several years in a row. Six Eritrean riders have been signed to international cycling teams, including Natnael Berhane and Daniel Teklehaimanot. Berhane was named African Sportsman of the Year in 2013, ahead of footballers Yaya Touré and Didier Drogba, while Teklehaimanot became the first Eritrean to ride the Vuelta a España in 2012. In 2015 Teklehaimanot won the King of the Mountains classification in the Critérium du Dauphine. Teklehaimanot and fellow Eritrean Merhawi Kudus became the first black African riders to compete in the Tour de France when they were selected by the MTN–Qhubeka team for the 2015 edition of the race, where, on 9 July, Teklehaimanot became the first African rider to wear the polkadot jersey.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who won the 2012 Vuelta a Espana?
Ah, so..
unanswerable