Erin counts six trolls hiding by the path in the forest, 6 less than four times that number of trolls hiding under the bridge, and half as many trolls hiding in the plains as under the bridge. How many trolls did she count in total?
First, multiply the number of forest trolls by 4: 6 trolls * 4 = <<6*4=24>>24 trolls
Then subtract 6 from that number to find the number of bridge trolls: 24 trolls - 6 trolls = <<24-6=18>>18 trolls
Then divide that number by 2 to find the number of plains trolls: 18 trolls / 2 = <<18/2=9>>9 trolls
Then add the number of trolls she saw in each location to find the total number: 6 trolls + 18 trolls + 9 trolls = <<6+18+9=33>>33 trolls
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