Test designers take great pains to make up questions that should be largely universal and almost entirely unaffected by amount of education.
Test designers purport to do that, but it's a generally replicated research finding that increased exposure to schooling, cross-culturally and across different brands of IQ tests, improves IQ test scores. See
Ceci, Stephen J. (1991). How Much Does Schooling Influence General Intelligence and Its Cognitive Components?
A Reassessment of the Evidence. Developmental Psychology
1991, Vol. 27, No. 5, 703-722
Comments
Test designers take great pains to make up questions that should be largely universal and almost entirely unaffected by amount of education.
Test designers purport to do that, but it's a generally replicated research finding that increased exposure to schooling, cross-culturally and across different brands of IQ tests, improves IQ test scores. See
Ceci, Stephen J. (1991). How Much Does Schooling Influence General Intelligence and Its Cognitive Components? A Reassessment of the Evidence. Developmental Psychology 1991, Vol. 27, No. 5, 703-722
for one classic paper on this subject.