I have complated this famous test in 10 minutes in the morning before caffeine granting me whooping 85 iq. 
Here you can check in 25 minutes -> https://www.mensa.org/mensa-iq-challenge/
I suppose the daily fluctuation would be something around +/- 15 iq, so if you have 85 iq in test, you may sometimes perform like 100 iq and sometimes like 70 iq. That's just my theory.
Here you can check in 25 minutes -> https://www.mensa.org/mensa-iq-challenge/
I suppose the daily fluctuation would be something around +/- 15 iq, so if you have 85 iq in test, you may sometimes perform like 100 iq and sometimes like 70 iq. That's just my theory.