This topic contains 4 replies, has 3 voices, and was last updated by Magnús Hallur Norðdahl 10 years, 6 months ago.
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Topic
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Hér er spurt um hvaða tölur eiga ekki heima í þessari röð hvaða tölur eru það : 1-3-5-7-11-13-17-19-23-29-31-37-39-41-43-47-49-51-53-57-59-61-63-65-67-71….
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