Purpose of current study was to investigate simple and multiple relations between mathematics' attitude, academic motivation and intelligence quotient with mathematics achievement. The Statistical population involved the entire Ardabil province' high schools students in 2008 (N = 33982). From these, 1670 students are selected as sample by using Cochran's formula and multiple cluster sampling. For gathering data, the following instrument is used. Raven IQ test (=0.86), Hermense Academic Achievement Test (=0.83), Moenikia mathematics attitude questionnaire (=0.79), and students' mathematics score in final exam. Correlation method was the research method. For data analysis, Pearson coefficient correlation and multiple regression in enter model were used. The Results showed that all of the variables correlate with together significantly. Mathematics' attitude, academic motivation, and intelligence quotient were predicator of mathematics achievement statistically significant.
Keywords: Mathematics attitude; academic motivation; intelligence quotient; mathematics achievement.