there no single agreed upon definition of general intelligence.

Questions were adjusted for each age group,and a child score reflected how theyperformed relative to others their age.Dividing someone score by their age and multiplying the result by 100 yielded the intelligence quotient, or IQ.Today, a score of 100 represents the average of a sample population,with 68% of the population scoring within 15 points of 100.Simon and Binet thought the skills their test assessed would reflect general intelligence.But both then and now,there no single agreed upon definition of general intelligence.