In this worksheet, you must fill in the missing numbers in the given sequences.

__Example__

Fill in the missing numbers in this sequence.

? |
28 | 39 | 50 | ? |

**Answer**

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

Here 50 - 39 and 39 - 28 both equal 11.

This means that the rule for the sequence is that each term goes up by 11.

The first term will be 28 - 11 = **17**.

The last term will be 50 + 11 = **61**

17 |
28 | 39 | 50 | 61 |