Question: In additive color devices such as computer displays and televisions, one of the primary light sources is typically a narrow-spectrum yellowish-green of dominant wavelength ~550 nm; this "green" primary is combined with an orangish-red "red" primary and a purplish-blue "blue" primary to produce any color in between the RGB color model. A unique green (green appearing neither yellowish nor bluish) is produced on such a device by mixing light from the green primary with some light from the blue primary.
Is there an answer to this question: What type of color devices are computer displays and televisions?

Answer: additive

Question: The Portuguese language is the official national language and the primary language taught in schools. English and Spanish are also part of the official curriculum. The city has six international schools: American School of Brasilia, Brasilia International School (BIS), Escola das Nacoes, Swiss International School (SIS), Lycee francais Francois-Mitterrand (LfFM) and Maple Bear Canadian School. August 2016 will see the opening of a new international school - The British School of Brasilia. Brasilia has two universities, three university centers, and many private colleges.
Is there an answer to this question: How many private colleges are in Brasilia?

Answer: unanswerable

Question: Politically, the paper's stance was less clear under Prime Minister Gordon Brown who succeeded Blair in June 2007. Its editorials were critical of many of Brown's policies and often more supportive of those of Conservative leader David Cameron. Rupert Murdoch, head of The Sun's parent company News Corporation, speaking at a 2007 meeting with the House of Lords Select Committee on Communications, which was investigating media ownership and the news, said that he acts as a "traditional proprietor". This means he exercises editorial control on major issues such as which political party to back in a general election or which policy to adopt on Europe.
Is there an answer to this question: What is the name of the company that operates The Sun?

Answer: News Corporation

Question: The situation in Switzerland and Liechtenstein is different from the rest of the German-speaking countries. The Swiss German dialects are the default everyday language in virtually every situation, whereas standard German is seldom spoken. Some Swiss German speakers perceive standard German to be a foreign language.
Is there an answer to this question: In which two countries is standard German used everyday?

Answer:
unanswerable