Sequences and series

What you'll learn

1. 1

   A sequence is a list of numbers that follow a rule — like the steps on a staircase 🪜

2. 2

   What do we call each number in a sequence?

3. 3

   Build this sequence: start at 3, add 2 each time. Drag the numbers onto the steps.

4. 4

   Find the next two terms in the sequence: 5, 8, 11, 14, ...

5. 5

   Now try this sequence: 2, 5, 8, 11, ... — add 3 each time. What is the 5th term?

6. 6

   What is the 5th term of the sequence 2, 5, 8, 11, ...?

7. 7

   A sequence starts at 10 and subtracts 2 each time. What is the 4th term?