Maybe the 2-digit scores are different because they took the test on diff. dates, and their tests were normalized due to the impact of the experimental questions and/or the performance of all other test takers of that same batch. I have asked this question here before, about whether or not this occurs, but no one has responded yet, I don't think.

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I used to pray and pray for a bike and never got one. Later I learned that God doesn't work that way... so I went out and stole a bike and asked God for forgiveness.