Mathematics

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Mathematics
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Factors, Prime Factors and Highest Common Factor (HCF)
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Definition of factor
A whole number that divides a number exactly
The factors of 18
1, 2, 3, 6, 9 and 18
Definition of a prime number
A number that can be divided exactly by 1 and by the number itself
Definition of prime factor
The factor that is a prime number
Definition of prime factorisation
The process of expressing a number as a product of the multiplication of its prime factors
Definition of common factor
A number that divides exactly two or more other numbers
A common factor for all numbers
1
The common factors of 6 and 30
1, 2, 3 and 6
Definition of highest common factor (HCF) of two numbers
Common factor for two numbers with the largest value
HCF for 6 and 30
6
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