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  2. Word problem (mathematics education) - Wikipedia

    en.wikipedia.org/wiki/Word_problem_(mathematics...

    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.

  3. Upside-down question and exclamation marks - Wikipedia

    en.wikipedia.org/wiki/Upside-down_question_and...

    The upside-down question mark ¿ is written before the first letter of an interrogative sentence or clause to indicate that a question follows. It is a rotated form of the standard symbol "?" recognized by speakers of other languages written with the Latin script. A regular question mark is written at the end of the sentence or clause.

  4. Interrobang - Wikipedia

    en.wikipedia.org/wiki/Interrobang

    Speckter solicited possible names for the new character from readers. Contenders included exclamaquest, and exclarotive, but he settled on interrobang. He chose the name to reference the punctuation marks that inspired it: interrogatio is Latin for "rhetorical question" or "cross-examination"; [10] bang is printers' slang for the exclamation ...

  5. Word problem (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Word_problem_(mathematics)

    In computational mathematics, a word problem is the problem of deciding whether two given expressions are equivalent with respect to a set of rewriting identities. A prototypical example is the word problem for groups, but there are many other instances as well.

  6. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  7. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    The order of operations, that is, the order in which the operations in an expression are usually performed, results from a convention adopted throughout mathematics, science, technology and many computer programming languages. It is summarized as: [2] [5] Parentheses; Exponentiation; Multiplication and division; Addition and subtraction

  8. Ordinal indicator - Wikipedia

    en.wikipedia.org/wiki/Ordinal_indicator

    In Spanish, using the two final letters of the word as it is spelled is not allowed, [5] except in the cases of primer (an apocope of primero) before singular masculine nouns, which is not abbreviated as 1.º but as 1. er, of tercer (an apocope of tercero) before singular masculine nouns, which is not abbreviated as 3.º but as 3. er, and of ...

  9. Exclamation mark - Wikipedia

    en.wikipedia.org/wiki/Exclamation_mark

    Graphically, the exclamation mark is represented by variations on the theme of a period with a vertical line above. One theory of its origin posits derivation from a Latin exclamation of joy, namely io, analogous to "hooray"; copyists wrote the Latin word io at the end of a sentence, to indicate expression of joy.

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