Practicing white board tests is more about learning composure, maintaining cool under pressure (and under observation), and finding a way to think and reason ab

Practicing white board tests is more about learning composure, maintaining cool under pressure (and under observation), and finding a way to think and reason about problems that "shows your work." Many times people can solve problems, but can't verbalise them enough to make a white board test be an accurate indication of how they think. It's not about practicing to solve any specific problem - that kind of "practice" is counterproductive as the poster realised.