Chapter 1

Primes, HCF and LCM

1.1 Primes, Prime Factorisation and Index Notation

Summary of Prime and Composite Numbers

by BESA Academy

Download these slides for ease of revision.

1.2 Highest Common Factor (HCF)

1.3 Lowest Common Multiple (LCM)

1.4 Square Roots and Cube Roots

Can you Solve the Locker Riddle?

on Youtube by TED-Ed

Challenge your students to solve this riddle involving factors, square numbers and prime numbers. Suitable for Higher-Order-Thinking activities. Students can use this activity to work on their presentation for long mathematical questions.