2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168735Many sequences of binomial coefficients share various unimodality properties. In this paper we consider the unimodality problem of a sequence of binomial coefficients located in a ray or a transversal of the Pascal triangle. Our results give in particular an affirmative answer to a conjecture of Belbachir et al which asserts that such a sequence of binomial coefficients must be unimodal. We also propose two more general conjectures.12 pages, 2 figuresCombinatorics05A10;05A20text