noun1. ASTRONOMY

a prominent pattern or group of stars, typically having a popular name but smaller than a constellation.

2. a group of three asterisks (⁂) drawing attention to following text.

Also used as Therefore in mathematics.

Mathematics uses many concepts in threes. The first structure mathematically is a triangle. There are acute, right, and obtuse angles. Trigonometry is the study of the relationship of the sides of a triangle. Have your heard of Pascal's Triangle?

noun1. ASTRONOMY

a prominent pattern or group of stars, typically having a popular name but smaller than a constellation.

2. a group of three asterisks (⁂) drawing attention to following text.

Also used as Therefore in mathematics.

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The Rule of Three is a Mathematical Rule that allows you to solve problems based on proportions. By having three numbers: a, b, c, such that, ( a / b = c / x), (i.e., a: b :: c: x ) you can calculate the unknown number. The Rule of Three Calculator uses the Rule of Three method to calculate the unknown value immediately based on the proportion between two numbers and the third number.

The working of the Rule of Three Calculator can be expressed as follows:

Continue reading The Rule of Three in Mathematics

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By Aimee Rawlins September 06, 2016 17:24PM ED

These “WMDs,” as she calls them, have three key features: They are opaque, scalable and unfair.

It’s no surprise that inequality in the U.S. is on the rise. But what you might not know is that math is partly to blame.

In a new book, “Weapons of Math Destruction,” Cathy O’Neil details all the ways that math is essentially being used for evil (my word, not hers).

From targeted advertising and insurance to education and policing, O’Neil looks at how algorithms and big data are targeting the poor, reinforcing racism and amplifying inequality.

Continue reading Math is racist: How data is driving inequality

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Here is a brainteaser involving 12 toothpicks that’s melting the grey matter of the entire internet. Can you beat it? The challenge is to turn this four-square pattern into just three squares. The rules? You can only move one toothpick at a time in any manner wish, but you cannot break or modify the toothpicks.

Answer below:

Continue reading brainteaser – 4 squares to 3 squares

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Euler’s Formula says: for any convex polyhedron (which includes the five Platonic Solids) the Number of Faces plus the Number of Vertices (corner points) minus the Number of Edges always equals 2

It is written: F + V – E = 2

Try it on the cube:

A cube has 6 Faces, 8 Vertices, and 12 Edges,

so:

6 + 8 – 12 = 2

Source: http://www.mathsisfun.com/geometry/platonic-solids-why-five.html

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The Indian numerals discussed in our article Indian numerals form the basis of the European number systems which are now widely used. However they were not transmitted directly from India to Europe but rather came first to the Arabic/Islamic peoples and from them to Europe.

Continue reading Hindu-Arabic numerals

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