Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Jerin lissafi shine adadin lambobi a cikin ci gaba na geometric. Alal misali:  Tambaya: Ana ƙara lambobin ci gaba na geometric kuma suna samar da wane jerin?
jerin lissafi