Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 2
Divisibility, HCF and LCM, Rational and Irrational Numbers
Every whole number above 1 is built from primes in exactly one way. This one fact finds the HCF and the LCM of any numbers, and it proves that a number such as the square root of 2 can never be written as a fraction. In this chapter you break numbers into primes, solve problems about bells, tiles and buses with the HCF and the LCM, and learn how to prove that a number is irrational. Python checks your work and finds patterns in thousands of numbers.
2 courses
