No need to brag about IQ, usually people with high IQ don't do that :P
Online tests, let alone free ones, aren't accurate anyways and contain more questions with multiple possible interpretations for correct answers than what is good for measuring.
Also, different regions use different ranges to determine IQ. 150+ is pretty much impossible (unmeasurable, it's a relative score so you need relations before measuring) in most of Europe (using Standard Deviation), for example, while other countries use a different range. Also, education is definitely important as it compares you to the right group of people to get the correct relation = IQ. So this test is pretty much bollocks. It may hit quite accurate numbers but it's way too fuzzy.