 
<translate> Teresa nwere pensụl 49 n'ihi na 14 + 35 = 49. Teresa na-enye pensụl 39 n'ihi na 49 - 10 = 39. Onye ọ bụla n'ime ụmụnne ya ga-enweta pensụl iri na atọ n'ihi na atọ na ọkara ụzọ atọ bụ otu ụzọ na atọ. N'ihi ya, azịza ya bụ 13. <eng> Teresa has 49 pencils because 14 + 35 = 49. Teresa gives away 39 pencils because 49 - 10 = 39. Each sibling gets 13 pencils because 39 / 3 = 13.
Therefore, the answer is 13. 