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A chain of 100 LDR's - please help!

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http://forum.allaboutcircuits.com – Hi all, firstly my electronic skills are medium and my circuit design skills are almost none. I have an arduino project to detect 100 light sensors, so my first thought was to use the resistance or voltage checking facility.. But the help I need is about the chained circuit, something like: If each activated LDR in the line bypasses a 100k resister, i could simply measure the total resistance to find out how many sensors are activated (or not activated, i don't mind calculating it backwards) Here is about as far as i got with my circuit, no idea if i need the 1m ohm resister to make i (Embedded)