GCSE Maths Final Exam Test Guide 2024.

GCSE Maths Final Exam Test Guide 2024. What are multiples? - ANSWER The times table of a number What is a factor? - ANSWER All of the numbers that divide into a number (2 is a factor of 6) How do you find the least common multiple of two numbers if you don't know the prime factors? - ANSWER -List the multiples of both numbers -Find the smallest number in both lists How do you find the least common multiple of two numbers if you know the prime factors? - ANSWER -List the prime factors that appear in either number -If a factor appears more than once (e.g 3 squared), list it that many times -Multiply these to get the LCM How do you find the highest common factor of two numbers if you don't know the prime factors? - ANSWER -List the factors of both numbers -Find the biggest number in both lists How do you find the highest common factor of two numbers if you know the prime factors? - ANSWER -List all the prime factors that appear in both numbers -If a number appears less in one list than the other (2 squared in one, 2 cubed in the other), list it the smaller amount of times -Multiply these to get the HCF How do you multiply fractions? - ANSWER -Multiply top by top -and bottom by bottom How do you divide fractions? - ANSWER -Turn one fraction upside down