B.4 is 2n - 1, so the missing number is 9.
B.5 alternates between adding 2 and subtracting 1, so the missing number is 5.
The words in Caps, are the ones I filled in previously to posting this. I would appreciate it, if someone could verify that they're correct. Also, could someone give me a little help on 'B)4/5', please?
Thanks people
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