Problem: BeiDou Navigation Satellite System:

In December 2011, Xinhua stated that "[t]he basic structure of the Beidou system has now been established, and engineers are now conducting comprehensive system test and evaluation. The system will provide test-run services of positioning, navigation and time for China and the neighboring areas before the end of this year, according to the authorities." The system became operational in the China region that same month. The global navigation system should be finished by 2020. As of December 2012, 16 satellites for BeiDou-2 have been launched, 14 of them are in service.

Of the 16 satellites launched for the BeiDou-2 system, how many are operational?
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A: 14

Problem: Capital punishment in the United States:

The death penalty is sought and applied more often in some jurisdictions, not only between states but within states. A 2004 Cornell University study showed that while 2.5 percent of murderers convicted nationwide were sentenced to the death penalty, in Nevada 6 percent were given the death penalty. Texas gave 2 percent of murderers a death sentence, less than the national average. Texas, however, executed 40 percent of those sentenced, which was about four times higher than the national average. California had executed only 1 percent of those sentenced.

What percentage of murderers in California are given the death penalty and subsequently executed?
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A: 1

Problem: Zhejiang:

Catholicism arrived 400 years ago in the province and Protestantism 150 years ago. Zhejiang is one of the provinces of China with the largest concentrations of Protestants, especially notable in the city of Wenzhou. In 1999 Zhejiang's Protestant population comprised 2.8% of the provincial population, a small percentage but higher than the national average.

How many years ago did Protestantism arrive in the province?
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A: 150

Problem: Multiracial American:

For African Americans, the one-drop rule was a significant factor in ethnic solidarity. African Americans generally shared a common cause in society regardless of their multiracial admixture, or social/economic stratification. Additionally, African Americans found it, near, impossible to learn about their Indigenous American heritage as many family elders withheld pertinent genealogical information. Tracing the genealogy of African Americans can be a very difficult process, especially for descendants of Indigenous Americans, because African Americans who were slaves were forbidden to learn to read and write, and a majority of Indigenous Americans neither spoke English, nor read or wrote it.

What factors did not affect racial solidarity amoung African Americans?
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A:
their multiracial admixture, or social/economic stratification