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Answers
Step-by-step explanation:
First, a quick note about the 'it could be anything' answers. There is a truth here that is worth noting, but take care not to overdo it. If you're given the sequence 2, 4, 6, 8, ... and expected to continue it, only a deliberately tricksy question master would have in mind anything but the multiples of two (if I asked you to add some words to the list Iron, Lead, Tin,... you would be right to feel cheated if it turned out to be items on my kitchen table rather than metals or chemical elements). Be aware that some problems may yield a sequence that seems to be one thing when it isn't, but an unwritten assumption behind 99.9% of problems set by teachers is that there is a solution and it is, theoretically at least, within your grasp.