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  2. Pattern Blocks - Wikipedia

    en.wikipedia.org/wiki/Pattern_blocks

    Pattern blocks were developed, along with a Teacher's Guide to their use, [1] at the Education Development Center in Newton, Massachusetts as part of the Elementary Science Study (ESS) project. [5] The first Trial Edition of the Teacher's Guide states: "Work on Pattern Blocks was begun by Edward Prenowitz in 1963.

  3. Pre-algebra - Wikipedia

    en.wikipedia.org/wiki/Pre-algebra

    Pre-algebra is a common name for a course taught in middle school mathematics in the United States, usually taught in the 6th, 7th, 8th, or 9th grade. [1] The main objective of it is to prepare students for the study of algebra. Usually, Algebra I is taught in the 8th or 9th grade. [2]

  4. René Descartes - Wikipedia

    en.wikipedia.org/wiki/René_Descartes

    René Descartes (/ d eɪ ˈ k ɑːr t / day-KART, also UK: / ˈ d eɪ k ɑːr t / DAY-kart; French: [ʁəne dekaʁt] ⓘ; [note 3] [11] 31 March 1596 – 11 February 1650) [12] [13]: 58 was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science.

  5. Cheryl's Birthday - Wikipedia

    en.wikipedia.org/wiki/Cheryl's_Birthday

    Cheryl's Birthday" is a logic puzzle, specifically a knowledge puzzle. [ 1 ] [ 2 ] The objective is to determine the birthday of a girl named Cheryl using a handful of clues given to her friends Albert and Bernard.

  6. Magic square - Wikipedia

    en.wikipedia.org/wiki/Magic_square

    The pattern table can be denoted using hexadecimals as (9, 6, 6, 9) for simplicity (1-nibble per row, 4 rows). The simplest method of generating the required pattern for higher ordered doubly even squares is to copy the generic pattern for the fourth-order square in each four-by-four sub-squares.

  7. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    With M = 365 days in a year, the average number of people required to find a pair with the same birthday is n = 1 + Q(M) ≈ 24.61659, somewhat more than 23, the number required for a 50% chance. In the best case, two people will suffice; at worst, the maximum possible number of M + 1 = 366 people is needed; but on average, only 25 people are ...

  8. Portal:Mathematics/Selected article archive - Wikipedia

    en.wikipedia.org/wiki/Portal:Mathematics/...

    A wallpaper group is a mathematical concept used to classify repetitive designs on two-dimensional surfaces, such as floors and walls, based on the symmetries in the pattern. Such patterns occur frequently in architecture and decorative art. The mathematical study of such patterns reveals that exactly 17 different types of pattern can occur.

  9. Crash Course (web series) - Wikipedia

    en.wikipedia.org/wiki/Crash_Course_(web_series)

    6 September 17, 2014 May 24, 2017 January 9, 2015 July 12, 2017 Hank Green John Green Emily Graslie [n 3] David Baker Launched in 2015 Anatomy & Physiology: 47 January 6, 2015 December 21, 2015 Hank Green Kathleen Yale Astronomy: 46 January 15, 2015 January 21, 2016 Phil Plait: Phil Plait US Government and Politics: 50 January 23, 2015 March 4 ...

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