Croatian mathematician Ivan Ivec is an IQ test specialist with an IQ of 174 himself. He has a website of his own that’s dedicated to IQ tests. He states that time restrictions on traditional intelligence tests are not necessarily ideal or an indicator of intelligence. As he puts it, “Specifically, there are intelligent people, capable of performing complex actions and resolving complex tasks, although their speed of solving is low.” You can take his IQ tests for free, here.