cube counting problem

[getsome111]

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http://imgur.com/DsS7DMV


I really don't see how they get 6 three sided cubes for this. I labeled the 5 that are in plain view, the last 2 being the ones hidden, and if 7 is the correct answer (not trying to sound pretentious); how did 73% of people get 6? are those percent answers in qvault just falsified?

edit;wrong url :/

 

[SafetyDog]

The one in the back right is 4.

 

[getsome111]

ah man safetydog to the rescue again, thanks