2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/59695The concordance orders of many algebraic order two knots of ten or fewer crossings have been heretofore unknown. We use Casson-Gordon invariants and twisted Alexander polynomials to find that, in all but one case, these knots do not have concordance order two. We also find that a certain family of algebraic order two twisted doubles of the unknot have infinite concordance order.14 pages, 1 figure, LaTaX with AMS packagesGeometric Topology57M25 (Primary) 57N70 (Secondary)text