Math 4
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4.1 Divisibility rules
4.2 Prime and composite numbers
4.3 Multiples
4.4 Factors
4.5 Prime Factorization
4.6 Common multiples and Least Common Multiple (LCM)
4.7 Finding LCM using prime factorization
4.8 Common factors and Highest Common Factor (HCF)
4.9 Finding HCF using prime factorization
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