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Word problem from the Līlāvatī (12th century), with its English translation and solution. In science education, a word problem is a mathematical exercise (such as in a textbook, worksheet, or exam) where significant background information on the problem is presented in ordinary language rather than in mathematical notation.
The word problem for an algebra is then to determine, given two expressions (words) involving the generators and operations, whether they represent the same element of the algebra modulo the identities. The word problems for groups and semigroups can be phrased as word problems for algebras. [1]
In January 2013, a time capsule dated 6 June 1907 was found in a cornerstone of the building at 140 Oak Street. [72] 1913 23 April 2013; 11 years ago () First Lutheran Church Oklahoma City: Oklahoma: A 100-year-old time capsule in the First Lutheran Church of Oklahoma City opened on 23 April 2013. [73] 1920 2024 Owatonna High School: Owatonna
When timetables are constructed by hand, the process is often 10% mathematics and 90% politics, [2] leading to errors, inefficiencies, and resentment among teachers and students." [1] For the simplest school timetable, such as an elementary school, these conditions must be satisfied: [3] a teacher cannot teach two courses in the same time slot
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Time Capsule I weighs about 800 pounds (360 kg), while Time Capsule II weighs about 400 pounds (180 kg). [5] Time Capsule I was made of a non-ferrous alloy called Cupaloy, created especially for this project. [6] Designed to resist corrosion for 5,000 years, the alloy was made of 99.4% copper, 0.5% chromium, and 0.1% silver. [7]
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It is widely debated when time capsules were first used, but the concept is fairly simple, and the idea and first use of time capsules could be much older than is currently documented. [2] The term "time capsule" appears to be a relatively recent coinage dating from 1938. [3] In Poland a time capsule dating to 1726 has been found. [4]