Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 31
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #riddles
David HartleyDied 28 Aug 1757 at age 52 (born 8 Aug 1705). English physician and philosopher credited with the first formulation of the psychological system known as associationism. Attempting to explain how thought processes occur, Hartley's associationism, with later modifications, has endured as an integral part of modern psychological theory.Image: Detail of an engraving. eb |