I don't think they tell you. I'm probably wrong, but when I took it in the late 90s, I think they only sent me a "Congratulations, you've been accepted" letter.
The test is just an IQ test. Whatever IQ test variation is taken, applicants have to score higher than the "top 2%" threshold. I seem to recall there was an option to submit your SAT scores if they were high enough (like 1400+ on the old test). If they did, I had to take the test since I didn't qualify that route...
I only applied to see if I could pass the test. I later found out that the membership was as useful as paying to get listed in a Who's Who book.... Not very if you're egoless like me...
I took mine in the early 80's and was told my score when I received the in invitation to join.
