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Amicable Numbers Two numbers are called amicable (or an amicable pair) if all the proper factors of the first number add up to the second number and the proper factors of the second number add up to the first number. e.g. 220 and 284 are amicable numbers. (Factors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110 which total 284,
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Averages, Means, Medians and Modes. Average is normally taken to be the ‘mean’, that is, the sum of a list of numbers, divided by the number of numbers in the list. Mean =. If you place the list of numbers in increasing order, the median is the number in the middle.
1. Introduction. Mathematics has its own language, much of which we are already familiar with. For example the digits. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. are part of our everyday lives. Whether we refer to 0 as ‘zero’, ‘nothing’, ‘nought’, or ‘O’ as in a telephone number, we understand its meaning.
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Free maths dictionary for students with over 955 common math words, math terms and maths definitions explained in simple language with visual examples. A math glossary with mathematics definitions, explanations, examples, math charts and posters for students and teachers. © Jenny Eather 2020.
Compare to map legend. greatest common factor (GCF) The largest factor that two or more counting numbers have in common. For example, the common factors of 24 and 36 are 1, 2, 3, 4, 6, and 12, and their greatest common factor is 12.
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The free printable PDF downloadable ebook below has all the definitions from all 26 of our online Math dictionary pages. See the alphabetical list below. Print or read from screen or download.
Symbol and Cue Cards. Create a set of symbol cards and matching cue cards as shown on the following pages. Symbol cards: Cards containing math terms, expressions, equations, etc. Cue cards: Cards containing phrases that match one or more of the symbol cards.
