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Use of brackets in numerical expression, expanding brackets, rule of BODMAS
Divisibility by 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 14 and 15
Concept of factors and multiples, Factors of prime and composite numbers
Prime numbers, meaning of factors of a number, prime factors of a number, w...
Defining and finding HCF of numbers, word problems on HCF
Defining and finding LCM of numbers, word problems on LCM