Head Start GCSE - Prime Factors and Prime Factorisation

This activity is designed to practice:

Writing a composite number as a product of prime factors
Working with composite numbers written in prime factorised form (index form)

Questions initially look at prime numbers and follow into prime factor decomposition using factor trees (fluency). Questions then look in more detail at the index form and calculating with numbers in index form, and recognising square numbers.

HCF and LCM are not addressed in this resource deliberately so that students spend time understanding the prime factorised form, rather than carrying out a process.

As always, answers are provided.