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3, 4, 5, 5, 5, 6, 7, 7, 7, ?
What's the next number in this series?
3, 4, 5, 5, 5, 6, 7, 7, 7, ?
3, 4, 5, 5, 5, 6, 7, 7, 7, ?
Answer
8.The nth entry is the nth composite number minus n.
3=4-1, 4=6-2, 5=8-3, 5=9-4, 5=10-5, 6=12-6, 7=14-7, 7=15-8, 7=16-9, 8=18-10.
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