A sequence is a pattern which is always the same.
Look at this example:
The pattern here is to add 1 to each number.
16 + 1 is 17, so the next number is 17.
Look at this next example:
The pattern is to take 1 away from each number.
10 - 1 is 9, so the missing number is 9.
Now, let's start the activities!