Intelligence tests are very useful for research in selecting the area of research etc. Uses in the study of National and racial differences Intelligence tests have their utility in making survey of recial groups. It helps to know the intelligence level of various races and nationalities. Intelligence test scores show that IQ. scores of Germans, Japanese and Americans are more than those of African and Mexicans. There are some of the important tasks of Intelligence tests. But while using the tests. Great care and many precautions are to be observed. Tests should be administered by well trained persons. Results should be interpreted with care. Test scores should not betaken to be absolutely reliable as tests are by no means prefect. They should have their limits of usefulness. We require to know much more about the individual than revealed by intelligence tests to make any decision about him.