Most common supervised IQ tests cannot measure very high IQs above 145-155 (s.d. 15). So, if your IQ score on a standardized IQ test (i.e. FRT or RAPM), you can try an IQ test for the high range.
Usually you have to pay to receive a score on such IQ tests but I have made my X-Test available on Scribd.
So, here is my proposal:
First of all, go to Classic IQ Test and take the test.
If your score is above 130, you can take my X-Test and then score it as I have explained in my paper X-Test Solution and scoring rules.
The complete solutions list for the Classic IQ Test is as follows:
Now you can be pretty confident that your IQ range is the real one.
So, if you scored (at the first attempt, it is clear), let us say, 118 on the Classic IQ test (iqtest.dk), you should avoid to take the X-Test, otherwise (if your score is 130+), you would try the X-Test (an HRT accepted by more than 20 recognized international high IQ societies) to find your true IQ range (up to 173 s.d. 15).
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