Problem: The Statistics Portugal (Portuguese: INE - Instituto Nacional de Estatistica) estimates that, according to the 2011 census, the population was 10,562,178 (of which 52% was female, 48% was male). This population has been relatively homogeneous for most of its history: a single religion (Catholicism) and a single language have contributed to this ethnic and national unity, namely after the expulsion of the Moors and Jews. A considerable number of Moors and Jews, nevertheless, stayed in Portugal, under the condition that they converted to Catholicism, and afterwards they were known as Mouriscos (former Muslims) and Cristaos Novos (New Christians or former Jews) some of whom may have continued to observe rabbinic Judaism in secret, as in the case of the secret Jews of Belmonte, who now observe the Jewish faith openly. After 1772 the distinction between Old and New Christians was abolished by decree. Some famous Portuguese New Christians were the mathematician Pedro Nunes and the physician and naturalist Garcia de Orta.
What percentage of the Portuguese population in 2011 was female?
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Answer: 52%

Problem: In 1976, contemporaneously with Woodson and Roberts, the Court decided Gregg v. Georgia and upheld a procedure in which the trial of capital crimes was bifurcated into guilt-innocence and sentencing phases. At the first proceeding, the jury decides the defendant's guilt; if the defendant is innocent or otherwise not convicted of first-degree murder, the death penalty will not be imposed. At the second hearing, the jury determines whether certain statutory aggravating factors exist, whether any mitigating factors exist, and, in many jurisdictions, weigh the aggravating and mitigating factors in assessing the ultimate penalty either death or life in prison, either with or without parole.
In what year was Gregg v. Georgia decided?
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Answer: 1976

Problem: In July 2015, Eton accidentally sent emails to 400 prospective students, offering them conditional entrance to the school in September 2017. The email was intended for nine students, but an IT glitch caused the email to be sent to 400 additional families, who didn't necessarily have a place. In response, the school issued the following statement: "This error was discovered within minutes and each family was immediately contacted to notify them that it should be disregarded and to apologise. We take this type of incident very seriously indeed and so a thorough investigation, overseen by the headmaster Tony Little and led by the tutor for admissions, is being carried out to find out exactly what went wrong and ensure it cannot happen again. Eton College offers its sincere apologies to those boys concerned and their families. We deeply regret the confusion and upset this must have caused."
How many prospective students received a mistaken email in July 2015?
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Answer:
400