Problem: Tennessee:

According to the U.S. Census Bureau, as of 2015, Tennessee had an estimated population of 6,600,299, which is an increase of 50,947, from the prior year and an increase of 254,194, or 4.01%, since the year 2010. This includes a natural increase since the last census of 142,266 people (that is 493,881 births minus 351,615 deaths), and an increase from net migration of 219,551 people into the state. Immigration from outside the United States resulted in a net increase of 59,385 people, and migration within the country produced a net increase of 160,166 people. Twenty percent of Tennesseans were born outside the South in 2008, compared to a figure of 13.5% in 1990.

What percentage population increase did Tennessee experience between 2010 and 2015?
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A: 4.01%


Problem: Solar energy:

Development of a solar-powered car has been an engineering goal since the 1980s. The World Solar Challenge is a biannual solar-powered car race, where teams from universities and enterprises compete over 3,021 kilometres (1,877 mi) across central Australia from Darwin to Adelaide. In 1987, when it was founded, the winner's average speed was 67 kilometres per hour (42 mph) and by 2007 the winner's average speed had improved to 90.87 kilometres per hour (56.46 mph). The North American Solar Challenge and the planned South African Solar Challenge are comparable competitions that reflect an international interest in the engineering and development of solar powered vehicles.

What was the average speed of a winning solar powered car in 1987?
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A: 67 kilometres per hour (42 mph)


Problem: Sino-Tibetan relations during the Ming dynasty:

When an ally of the Ü-Tsang ruler threatened destruction of the Gelugpas again, the fifth Dalai Lama Lozang Gyatso pleaded for help from the Mongol prince Güshi Khan (1582–1655), leader of the Khoshut (Qoshot) tribe of the Oirat Mongols, who was then on a pilgrimage to Lhasa. Güshi Khan accepted his role as protector, and from 1637–1640 he not only defeated the Gelugpas' enemies in the Amdo and Kham regions, but also resettled his entire tribe into Amdo. Sonam Chöpel urged Güshi Khan to assault the Ü-Tsang king's homebase of Shigatse, which Güshi Khan agreed upon, enlisting the aid of Gelug monks and supporters. In 1642, after a year's siege of Shigatse, the Ü-Tsang forces surrendered. Güshi Khan then captured and summarily executed Karma Tenkyong, the ruler of Ü-Tsang, King of Tibet.

Which enemies did Güshi Khan defeat? 
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A: the Gelugpas


Problem: Madonna (entertainer):

The MDNA Tour, which further promoted the album, began in May 2012 in Tel Aviv, Israel. The tour has received positive critical reception, but featured controversial subjects such as violence, firearms, human rights, nudity and politics. Lawsuits threatened against Madonna have also been engaged from the tour. It was a box office success with a gross of $305.2 million from 88 sold-out shows, and became the highest-grossing tour of 2012 and the tenth highest-grossing tour of all time. At the 2013 Billboard Music Awards, Madonna won three trophies for Top Touring Artist, Top Dance Artist and Top Dance Album. Madonna was named the top-earning celebrity of the year by Forbes, earning an estimated $125 million, due to the success of the tour.

Who named Madonna as the top-earning celebrity of the year?
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A:
Forbes