<prompt> Chronological age 10 yrs, mental age 4 yrs. What that person called as ?IdiotImbecileNormalGenius  <response>: IQ mental age chronological age 100 mental age -4, chronological age -10 410 100 40 level of intelligence IQ range idiot 0-24 imbecile 25-49 moron 50-69 borderline 70-79 low normal 80-89 normal 90-109 superior 110-119 very superior 120-139 near genius 140 and above ref ;page no;67923rd edition of PARK;s textbook of Preventive and Social medicine 