You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is 10 year old child with mental age of 2 years will have an IQ level of: September 2010, March 2013 (h) and explain in detail?
Ans. A: 20 The formula for calculating IQ developed by Terman was 100 x MA / CA. Chronological Age (CA) (i.e. Biological age) Mental Age (MA) (i.e. Level of intellectual performance)