In this activity, we will learn how to fill in the missing numbers in given sequences.

**e.g. Fill in the missing numbers in this sequence:**

A | B | 51 | 39 | 27 |

**Answer:**

Look for clues from neighbouring terms to work out the rule.

Here 51 - 39 and 39 - 27 both equal 12.

This means that the rule for the sequence is that each term goes down by 12.

B will be 51 + 12 = **63**.

A will be 63 + 12 = **75**.

So the final sequence is:

75 |
63 |
51 | 39 | 27 |