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2. 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 ...

3. Snellen chart - Wikipedia

   en.wikipedia.org/wiki/Snellen_chart

   In the most familiar acuity test, a Snellen chart is placed at a standard distance: 6 metres. At this distance, the symbols on the line representing "normal" acuity subtend an angle of five minutes of arc, and the thickness of the lines and of the spaces between the lines subtends one minute of arc. This line, designated 6/6 (or 20/20), is the ...

4. List of prime numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_prime_numbers

   Print/export Download as PDF; ... The following table lists the first 1000 primes, with 20 columns of consecutive primes in each of the 50 rows. ... 9 p − 1 ≡ 1 ...

5. Bristol stool scale - Wikipedia

   en.wikipedia.org/wiki/Bristol_stool_scale

   The Bristol stool scale is a diagnostic medical tool designed to classify the form of human faeces into seven categories. [4] It is used in both clinical and experimental fields. [5][6][7] It was developed at the Bristol Royal Infirmary as a clinical assessment tool in 1997, [8] and is widely used as a research tool to evaluate the ...

6. Chisanbop - Wikipedia

   en.wikipedia.org/wiki/Chisanbop

   Chisanbop or chisenbop (from Korean chi (ji) finger + sanpŏp (sanbeop) calculation [1] 지산법/指算法), sometimes called Fingermath, [2] is a finger counting method used to perform basic mathematical operations. According to The Complete Book of Chisanbop[3] by Hang Young Pai, chisanbop was created in the 1940s in Korea by Sung Jin Pai ...

7. Multiplication sign - Wikipedia

   en.wikipedia.org/wiki/Multiplication_sign

   The multiplication sign (×), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. [ 1 ] The symbol is also used in botany , in botanical hybrid names and the heavy goods vehicle industry, to calculate the amount of powered wheels.