## The Number and Algebra unit

Please find links to key chapters from this area of the course below.

### Sets of Numbers

This sub topic is about the 4 key sets of numbers that define our number system. Natural numbers, Integers, Rational numbers and Real numbers. This section starts by taking you through the concept of number sets, starting with sets that we...

### Arithmetic Sequences

These are sequences where the difference from one term to the next remains constant, like the one in the title! Arithmetic sequences crop up in all sorts of places and this unit looks at understanding how to generalise, sum and solve problems...

### Geometric Sequences

These are sequences where you go from term to term by multiplying by a common ratio. the one in the title has a common ratio of 3 because each term is 3 times bigger than the previous one. Geometric sequences grow exponentially and should be...