Spat-1
This is a form of equation.
The first answer is given.
But what should replace the questionmark?
One attempt allowed.
Level: very hard.
Date 2017-01-23
Submissions Correct Not Correct
26 2 24
Solved by Tomas Perna, CZ
Jason Betts, AU
A first preliminary norm for this test after 15 submissions
Correct answered question IQ +170 sd 15 can be expected