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  2. Investigations in Numbers, Data, and Space - Wikipedia

    en.wikipedia.org/wiki/Investigations_in_Numbers...

    In the original edition, there was no multiplication table presented. Instead, students were instructed to color-code multiples of numbers on a 100s chart and evaluate these charts to find common multiples and patterns. There is no formal presentation of decimal addition. Students are instructed to begin by using colored pencils on 10,000 grid ...

  3. Numeracy - Wikipedia

    en.wikipedia.org/wiki/Numeracy

    The assessment included tests for number, algebra (also called patterns and relationships at fourth grade), measurement, geometry, and data. The latest study, in 2003, found that children from Singapore at both grade levels had the highest performance. Countries like Hong Kong SAR, Japan, and Taiwan also shared high levels of numeracy.

  4. Pentagonal number - Wikipedia

    en.wikipedia.org/wiki/Pentagonal_number

    The nth pentagonal number p n is the number of distinct dots in a pattern of dots consisting of the outlines of regular pentagons with sides up to n dots, when the pentagons are overlaid so that they share one vertex. For instance, the third one is formed from outlines comprising 1, 5 and 10 dots, but the 1, and 3 of the 5, coincide with 3 of ...

  5. Prime k-tuple - Wikipedia

    en.wikipedia.org/wiki/Prime_k-tuple

    In number theory, a prime k-tuple is a finite collection of values representing a repeatable pattern of differences between prime numbers. For a k - tuple (a, b, …), the positions where the k -tuple matches a pattern in the prime numbers are given by the set of integers n such that all of the values (n + a, n + b, …) are prime.

  6. Sierpiński triangle - Wikipedia

    en.wikipedia.org/wiki/Sierpiński_triangle

    Start by labeling p 1, p 2 and p 3 as the corners of the Sierpinski triangle, and a random point v 1. Set v n+1 = 1 / 2 (v n + p r n), where r n is a random number 1, 2 or 3. Draw the points v 1 to v ∞. If the first point v 1 was a point on the Sierpiński triangle, then all the points v n lie on the Sierpiński triangle.

  7. Figurate number - Wikipedia

    en.wikipedia.org/wiki/Figurate_number

    The term figurate number is used by different writers for members of different sets of numbers, generalizing from triangular numbers to different shapes (polygonal numbers) and different dimensions (polyhedral numbers). The term can mean. a number represented as a discrete r -dimensional regular geometric pattern of r -dimensional balls such as ...

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