![Problem Department]()
Problem DepartmentWalter B. Clarke, C. W. Trigg, J. Rosenbaum, D. L. MacKay, M. Kac, L. M. Kelly, H. T. R. Aude, E. C. Kennedy, Albert Farnell, Johannes Mahrenholz, Yudell Luke, V. Thebault, Annie Christensen, A. A. Aucoin, W. V. Parker, Nathan Altshiller-Court and W. C. Janes · National Mathematics Magazine · 1939