• HCF and LCM are important concepts in math
• HCF is the highest number that divides exactly into 2 or more numbers
• LCM is the smallest number in the times table of 2 or more numbers
• The process of finding HCF and LCM involves expressing numbers as the product of their prime factors
• The law of indices and standard form are also important concepts in math that involve rules for multiplying and writing very large or small numbers
• Surds are numbers written using square or cube roots and have their own set of rules when multiplied

This may help students who are struggling with HCF and LCM questions, or are looking for examples and worksheets related to standard form and surds.