Serial 7 substraction is used to test ?: (A) Working memory, (B) Long term memory, (C) Mathematical ability, (D) Recall power
Answer is A. Ans. A. Working memorySerial sevens substraction testSerial sevens, counting down from one hundred by sevens, is a clinical test used to test mental function; for example, to help assess mental status after possible head injury or in suspected cases of dementia.This well-known test, in active documented use since at least l944,was adopted as pa of the mini-mental state examination.The test is also used in determining when a patient is becoming unconscious under anaesthetic, for example prior to major dental surgery.