IQ tests - indeed, how do illiterate people do them? Can an IQ test have any relevance for an illiterate person? IQ tests rely upon patterns, number patterns, or shape patterns. Literacy relies upon patterns. A literate person has an automatic head start over an illiterate person as they have been trained to recognise patterns, usually from a very early age. I just did this test
http://www.test-iq.org/?gclid=CjwKE...yTvtHzRaXwMKImRqD1kHCU-7h5VTTCyrHCxoCgyzw_wcB, completed it within 14 minutes (with several interruptions) so well within the 20 minutes allowed and scored 20/20. At least this was all logic, or patterns.
Another test was 20/20 but involved mostly number sequences, anagrams, both, and only a couple of pure patterns. What does an IQ test for people of any literacy look like? And I did both these without having read a word of E.M. Forster!
Personally I think it is attitude that is most important. If your mental ability means that you aren't able to do much more than dig holes - dig bloody good holes. You'll always get a job.