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pdurrant · 06-12-2010, 02:34 PM

OK, after the last one, here's one that's purely arithmetic.

9, 14, 7, 11, 17, 26, 13, 20, 10, 5, ?, ?, ?, ?

What are the next four numbers in this sequence?
What are the rules to this sequence?
Why have I only asked for four more terms?

Don't forget to enclose answers in spoiler tags.

06-12-2010, 02:34 PM	#1
pdurrant The Grand Mouse 高貴的老鼠 Posts: 74,117 Karma: 315558332 Join Date: Jul 2007 Location: Norfolk, England Device: Kindle Oasis	Arithmetic number puzzle OK, after the last one, here's one that's purely arithmetic. 9, 14, 7, 11, 17, 26, 13, 20, 10, 5, ?, ?, ?, ? What are the next four numbers in this sequence? What are the rules to this sequence? Why have I only asked for four more terms? Don't forget to enclose answers in spoiler tags.