Here is a question about this article: New York became the most populous urbanized area in the world in the early 1920s, overtaking London. The metropolitan area surpassed the 10 million mark in the early 1930s, becoming the first megacity in human history. The difficult years of the Great Depression saw the election of reformer Fiorello La Guardia as mayor and the fall of Tammany Hall after eighty years of political dominance.
What is the answer to this question: In the 1930s, New York City had more than 10 million people becoming the first what in history?
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So... megacity

Here is a question about this article: In addition to and independent of the division into suras, there are various ways of dividing the Quran into parts of approximately equal length for convenience in reading. The 30 juz' (plural ajza') can be used to read through the entire Quran in a month. Some of these parts are known by nameswhich are the first few words by which the juz' starts. A juz' is sometimes further divided into two hizb (plural ahzab), and each hizb subdivided into four rub al-ahzab. The Quran is also divided into seven approximately equal parts, manzil (plural manazil), for it to be recited in a week.
What is the answer to this question: How many ahzab are in a juz'?
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So... two

Here is a question about this article: Sichuan came under the firm control of a Chinese central government during the Sui dynasty, but it was during the subsequent Tang dynasty where Sichuan regained its previous political and cultural prominence for which it was known during the Han. Chengdu became nationally known as a supplier of armies and the home of Du Fu, who is sometimes called China's greatest poet. During the An Lushan Rebellion (755-763), Emperor Xuanzong of Tang fled from Chang'an to Sichuan. The region was torn by constant warfare and economic distress as it was besieged by the Tibetan Empire.
What is the answer to this question: Which empire ravished the Chengdu region with constant warfare and economic distress?
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So...
the Tibetan Empire