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2. Chinese multiplication table - Wikipedia

   en.wikipedia.org/wiki/Chinese_multiplication_table

   It is also known as nine-nine song (or poem), [2] as the table consists of eighty-one lines with four or five Chinese characters per lines; this thus created a constant metre and render the multiplication table as a poem. For example, 9 × 9 = 81 would be rendered as "九九八十一", or "nine nine eighty one", with the world for "begets" "得 ...

3. Multiplication table - Wikipedia

   en.wikipedia.org/wiki/Multiplication_table

   Multiplication table. In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system. The decimal multiplication table was traditionally taught as an essential part of elementary arithmetic around the world, as it lays the foundation for ...

4. Vedic square - Wikipedia

   en.wikipedia.org/wiki/Vedic_square

   Vedic square. In Indian mathematics, a Vedic square is a variation on a typical 9 × 9 multiplication table where the entry in each cell is the digital root of the product of the column and row headings i.e. the remainder when the product of the row and column headings is divided by 9 (with remainder 0 represented by 9).

5. Culture of the Song dynasty - Wikipedia

   en.wikipedia.org/wiki/Culture_of_the_Song_Dynasty

   Games in the Jinming Pool, by Zhang Zeduan, a painting depicting the imperial gardens of Kaifeng, Northern Song. The Song dynasty (960–1279 AD) was a culturally rich and sophisticated age for China. It saw great advancements in the visual arts, music, literature, and philosophy. Officials of the ruling bureaucracy, who underwent a strict and ...

6. Casting out nines - Wikipedia

   en.wikipedia.org/wiki/Casting_out_nines

   Let us look at a simple multiplication: 5 × 7 = 35, (3 + 5 = 8). Now consider (7 + 9) × 5 = 16 × 5 = 80, (8 + 0 = 8) or 7 × (9 + 5) = 7 × 14 = 98, (9 + 8 = 17), (1 + 7 = 8). Any non-negative integer can be written as 9×n + a, where 'a' is a single digit from 0 to 8, and 'n' is some non-negative integer. Thus, using the distributive rule ...

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8. Science and technology of the Song dynasty - Wikipedia

   en.wikipedia.org/wiki/Science_and_technology_of...

   By era. v. t. e. The Song dynasty (Chinese: 宋朝; 960–1279 CE) witnessed many substantial scientific and technological advances in Chinese history. Some of these advances and innovations were the products of talented statesmen and scholar-officials drafted by the government through imperial examinations. Shen Kuo (1031–1095), author of ...

9. Zhuo Qun Song - Wikipedia

   en.wikipedia.org/wiki/Zhuo_Qun_Song

   Song attended Princeton University where he graduated in 2019 with a Bachelor of Arts in Mathematics. [14] During his time at Princeton, Song was part of the team that participated in the Putnam Competition. His team won second place in 2016 [15] and third place in 2017. [16] Song was previously a Quantitative Researcher at Citadel LLC. [17]