Problem: For the ancient Egyptians, green had very positive associations. The hieroglyph for green represented a growing papyrus sprout, showing the close connection between green, vegetation, vigor and growth. In wall paintings, the ruler of the underworld, Osiris, was typically portrayed with a green face, because green was the symbol of good health and rebirth. Palettes of green facial makeup, made with malachite, were found in tombs. It was worn by both the living and dead, particularly around the eyes, to protect them from evil. Tombs also often contained small green amulets in the shape of scarab beetles made of malachite, which would protect and give vigor to the deceased. It also symbolized the sea, which was called the "Very Green."
Why was green facial makeup worn by ancient Egyptians?
The answer is the following: to protect them from evil

Problem: In 1943, Karachay Autonomous Oblast was dissolved by Joseph Stalin, when the Karachays were exiled to Central Asia for their alleged collaboration with the Germans and territory was incorporated into the Georgian SSR.
Why were the Karachays exiled?
The answer is the following: alleged collaboration with the Germans

Problem: The European Revolutions of 1848, known in some countries as the Spring of Nations or the Year of Revolution, were a series of political upheavals throughout the European continent. Described as a revolutionary wave, the period of unrest began in France and then, further propelled by the French Revolution of 1848, soon spread to the rest of Europe. Although most of the revolutions were quickly put down, there was a significant amount of violence in many areas, with tens of thousands of people tortured and killed. While the immediate political effects of the revolutions were reversed, the long-term reverberations of the events were far-reaching.
How many people were estimated to be killed in the revolutions?
The answer is the following: tens of thousands

Problem: On 11 April 2006, Brian May and Roger Taylor appeared on the American singing contest television show American Idol. Each contestant was required to sing a Queen song during that week of the competition. Songs which appeared on the show included "Bohemian Rhapsody", "Fat Bottomed Girls", "The Show Must Go On", "Who Wants to Live Forever", and "Innuendo". Brian May later criticised the show for editing specific scenes, one of which made the group's time with contestant Ace Young look negative, despite it being the opposite. Taylor and May again appeared on the American Idol season 8 finale in May 2009, performing "We Are the Champions" with finalists Adam Lambert and Kris Allen. On 15 November 2009, Brian May and Roger Taylor appeared on the singing contest television show X Factor in the UK.
On what date in 2006 did May and Taylor of Queen appear on American Idol?
The answer is the following:
11 April