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2. Fraction - Wikipedia

   en.wikipedia.org/wiki/Fraction

   (For example, "two-fifths" is the fraction ⁠ 2 / 5 ⁠ and "two fifths" is the same fraction understood as 2 instances of ⁠ 1 / 5 ⁠.) Fractions should always be hyphenated when used as adjectives. Alternatively, a fraction may be described by reading it out as the numerator "over" the denominator, with the denominator expressed as a ...

3. List of unusual units of measurement - Wikipedia

   en.wikipedia.org/wiki/List_of_unusual_units_of...

   While usually sub-second units are represented with SI prefixes on the second (e.g. milliseconds), this system can be extrapolated further, such that a "Third" would mean 1 ⁄ 60 of a second (16.7 milliseconds), and a "Fourth" would mean 1 ⁄ 60 of a third (278 microseconds), etc. These units are occasionally used in astronomy to denote angles.

4. Farey sequence - Wikipedia

   en.wikipedia.org/wiki/Farey_sequence

   If 0 < ⁠ p / q ⁠ < 1 then the Ford circles that are tangent to C[p/q] are precisely the Ford circles for fractions that are neighbours of ⁠ p / q ⁠ in some Farey sequence. Thus C[2/5] is tangent to C[1/2], C[1/3], C[3/7], C[3/8], etc. Ford circles appear also in the Apollonian gasket (0,0,1,1). The picture below illustrates this ...

5. Ordinal numeral - Wikipedia

   en.wikipedia.org/wiki/Ordinal_numeral

   Ordinal numbers may be written in English with numerals and letter suffixes: 1st, 2nd or 2d, 3rd or 3d, 4th, 11th, 21st, 101st, 477th, etc., with the suffix acting as an ordinal indicator. Written dates often omit the suffix, although it is nevertheless pronounced. For example: 5 November 1605 (pronounced "the fifth of November ...

6. 2 kindergarteners wounded in Northern California school ...

   www.aol.com/suspect-dead-shooting-northern...

   The two kindergarten students who were wounded in a school shooting in the Northern California community of Palermo remain in critical condition after a successful surgery on Friday, the Butte ...

7. Dividing a circle into areas - Wikipedia

   en.wikipedia.org/wiki/Dividing_a_circle_into_areas

   The number of points (n), chords (c) and regions (r G) for first 6 terms of Moser's circle problem. In geometry, the problem of dividing a circle into areas by means of an inscribed polygon with n sides in such a way as to maximise the number of areas created by the edges and diagonals, sometimes called Moser's circle problem (named after Leo Moser), has a solution by an inductive method.