How many steel tubes is necessary for the oil rig?
I have put 6 in so far and it is asking for another one.
I am exhausting my metal.
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It’s a random number every time. Sometimes it can whistle with the first one, sometimes it can take more… Keep trying 
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It took 8 steel pipes to get oil.
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There is a 98.85% chance of finding oil with 20 steel pipes.
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Wow. Glad you got there finally!
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