A number sequence is a series of numbers written in such a way that each number in the sequence can be got by following a given rule. For example, in the sequence 4, 16, 64, 256, ... each number in the sequence can be got from the previous term by multiplying by 4. In this case, the rule is: multiply by 4. The numbers in a sequence are called 'terms': in 4, 8, 12, 16, ... '4' is the first term and '12' is the third term.
See how you do in this 11-plus Maths quiz with these slightly more difficult sequences. Make sure you've played our first set of 'very easy' quizzes on number sequences before tackling this one.
TIP: Knowing your times tables will help you with sequences.