Ross's PAT Tests

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I did all of his tests, some answers looks wrong to me. There are quite a few errors in answers, I would say 3-4 total errors. I never got above 20 for any test. I think some of his TFE, Keyhole are harder, and may match upto real DAT difficulty. I have done all tests three times.
 
what about the cube? I got really confused on some of the cube problems because of the way they were drawn.
 
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