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2. List of types of numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_types_of_numbers

   Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.

3. Recreational mathematics - Wikipedia

   en.wikipedia.org/wiki/Recreational_mathematics

   Some of the more well-known topics in recreational mathematics are Rubik's Cubes, magic squares, fractals, logic puzzles and mathematical chess problems, but this area of mathematics includes the aesthetics and culture of mathematics, peculiar or amusing stories and coincidences about mathematics, and the personal lives of mathematicians.

4. Decimal separator - Wikipedia

   en.wikipedia.org/wiki/Decimal_separator

   Download as PDF; Printable version; In other projects ... i.e. also allows 1_00_00_000 aligning with the Indian number style of 1,00,00,000 that ... a full space can ...

5. Number theory - Wikipedia

   en.wikipedia.org/wiki/Number_theory

   Number theory is a branch of pure mathematics devoted primarily to the study of the integers and arithmetic functions.German mathematician Carl Friedrich Gauss (1777–1855) said, "Mathematics is the queen of the sciences—and number theory is the queen of mathematics."

6. Numeracy - Wikipedia

   en.wikipedia.org/wiki/Numeracy

   Numeracy is the ability to understand, reason with, and apply simple numerical concepts. [1] The charity National Numeracy states: "Numeracy means understanding how mathematics is used in the real world and being able to apply it to make the best possible decisions...It's as much about thinking and reasoning as about 'doing sums'".

7. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   The modern study of number theory in its abstract form is largely attributed to Pierre de Fermat and Leonhard Euler. The field came to full fruition with the contributions of Adrien-Marie Legendre and Carl Friedrich Gauss. [17] Many easily stated number problems have solutions that require sophisticated methods, often from across mathematics.