![Problem Department]()
Problem DepartmentJ. Rosenbaum, Johannes Mahrenholz, Howard D. Grossman, Walter B. Clarke, W. T. Short, W. V. Parker, C. W. Trigg, H. T. R. Aude, Howard D. Grossman, R. E. Gaines, V. Thebault, Paul D. Thomas, H. L. Smith, Nathan Altshiller-Court and Daniel Arany · National Mathematics Magazine · 1940