QUES: In addition to numerous articles on mathematics, Whitehead wrote three major books on the subject: A Treatise on Universal Algebra (1898), Principia Mathematica (co-written with Bertrand Russell and published in three volumes between 1910 and 1913), and An Introduction to Mathematics (1911). The former two books were aimed exclusively at professional mathematicians, while the latter book was intended for a larger audience, covering the history of mathematics and its philosophical foundations. Principia Mathematica in particular is regarded as one of the most important works in mathematical logic of the 20th century.

What was Whitehead's first published book on mathematics?
What is the answer?
ANS: A Treatise on Universal Algebra
QUES: The restrictions were tightened by the Defence of the Realm Act of August 1914, which, along with the introduction of rationing and the censorship of the press for wartime purposes, restricted pubs' opening hours to 12 noon–2:30 pm and 6:30 pm–9:30 pm. Opening for the full licensed hours was compulsory, and closing time was equally firmly enforced by the police; a landlord might lose his licence for infractions. Pubs were closed under the Act and compensation paid, for example in Pembrokeshire.

What body enforced pubs' closing hours under the Defence of the Realm Act?
What is the answer?
ANS: the police
QUES: As of 2010[update], 79.12% (1,112,441) of Philadelphia residents age 5 and older spoke English at home as a primary language, while 9.72% (136,688) spoke Spanish, 1.64% (23,075) Chinese, 0.89% (12,499) Vietnamese, 0.77% (10,885) Russian, 0.66% (9,240) French, 0.61% (8,639) other Asian languages, 0.58% (8,217) African languages, 0.56% (7,933) Cambodian (Mon-Khmer), and Italian was spoken as a main language by 0.55% (7,773) of the population over the age of five. In total, 20.88% (293,544) of Philadelphia's population age 5 and older spoke a mother language other than English.

What is the total over 5's that speak another language than English?
What is the answer?
ANS:
20.88%