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4
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Numbers that can be written in the form a/b, where a and b are both integers, and b is not zero
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5
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The set of all the rational and irrational numbers together
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6
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A number that has three or more factors
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7
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A number that divides exactly into another number
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9
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The set of counting numbers starting from 1
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10
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Numbers that have two, and only two, factors
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12
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The factors of a number that which are prime numbers
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1
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Any non-negative integer i.e. 0, 1, 2, 3,
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2
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The set of positive and negative numbers, including zero
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3
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Numbers that can only be written in number form (no symbols) as a never ending, non-repeating decimal fraction
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8
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The common multiple of two (or more) numbers that is the smallest possible number into which all them will divide exactly
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11
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The common factor of two (or more) numbers which has the greatest value
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13
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A number made by multiplying two other numbers
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