<?xml version="1.0" encoding="UTF-8" standalone="yes"?><oembed><version><![CDATA[1.0]]></version><provider_name><![CDATA[justpuzzles]]></provider_name><provider_url><![CDATA[https://justpuzzles.wordpress.com]]></provider_url><author_name><![CDATA[Teun Spaans]]></author_name><author_url><![CDATA[https://justpuzzles.wordpress.com/author/teunspaans/]]></author_url><title><![CDATA[Pattern code &#8211;&nbsp;chemistry]]></title><type><![CDATA[link]]></type><html><![CDATA[<p><strong>1) Graphs</strong><br />
What code goes to the question mark?<br />
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<p>You can check your solution&gt;<a href="https://justpuzzles.wordpress.com/solutions-to-puzzles/#150">here</a></p>
<p>&nbsp;</p>
<p>A new puzzle is published every friday. The solution is generally published one week later. I welcome your reactions on these puzzles: are they too easy, too difficult, are there any multiple solutions? How long did you need to solve it?</p>
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