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  2. Cuisenaire rods - Wikipedia

    en.wikipedia.org/wiki/Cuisenaire_rods

    Cuisenaire rods illustrating the factors of ten A demonstration the first pair of amicable numbers, (220,284). Cuisenaire rods are mathematics learning aids for pupils that provide an interactive, hands-on [1] way to explore mathematics and learn mathematical concepts, such as the four basic arithmetical operations, working with fractions and finding divisors.

  3. Pattern Blocks - Wikipedia

    en.wikipedia.org/wiki/Pattern_blocks

    Many ESS staff members tried the materials and suggested additional activities." [ 6 ] When Marion Walter , who was also part of the project in the 1960s spoke to Prenowitz in 1996, he said that he considered the allocation of one color to all blocks of a particular shape, much like Cuisenaire rods , which may have given him the idea, to be one ...

  4. Manipulative (mathematics education) - Wikipedia

    en.wikipedia.org/wiki/Manipulative_(mathematics...

    Cuisenaire rods in a staircase arrangement Interlocking "multilink" linking cubes A Polydron icosahedron. In mathematics education, a manipulative is an object which is designed so that a learner can perceive some mathematical concept by manipulating it, hence its name. The use of manipulatives provides a way for children to learn concepts ...

  5. Amicable numbers - Wikipedia

    en.wikipedia.org/wiki/Amicable_numbers

    Demonstration with Cuisenaire rods of the amicability of the pair of numbers (220,284), the first of the series.. In mathematics, the amicable numbers are two different natural numbers related in such a way that the sum of the proper divisors of each is equal to the other number.

  6. Georges Cuisenaire - Wikipedia

    en.wikipedia.org/wiki/Georges_Cuisenaire

    Georges Cuisenaire (1891–1975), also known as Emile-Georges Cuisenaire, [1] was a Belgian teacher who invented Cuisenaire rods, a mathematics teaching aid. Life [ edit ]

  7. File:Perfect number Cuisenaire rods 6 exact.svg - Wikipedia

    en.wikipedia.org/wiki/File:Perfect_number...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  8. File:Five-limit tuning ratios Cuisenaire diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Five-limit_tuning...

    English: Cuisenaire rod diagram of common ratios produced by five-limit tuning and their assigned notes, with C as base note. Blue captions indicate building blocks: octave in white, perfect fifth in light blue and major third in dark blue.

  9. Semiperfect number - Wikipedia

    en.wikipedia.org/wiki/Semiperfect_number

    Every multiple of a semiperfect number is semiperfect. [1] A semiperfect number that is not divisible by any smaller semiperfect number is called primitive.; Every number of the form 2 m p for a natural number m and an odd prime number p such that p < 2 m+1 is also semiperfect.

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