Why not "Deset nebo jedenáct z nich tam bydlelo."?
Yes, this is acceptable, I willl add it.
i put "bydlelo tam deset nebo jedenáct od jich", and that was marked incorrect. what did i do wrong in this one?
you use the n- pronouns with prepositionas
you need z here, not od
"z nich" would be approriate here but does not fit the sentence that well anyway. It is not currently accepted and I do not immediately see any word order where it would sound natural.
Why ‘Bydlelo’ and not ‘Bydleli’?
Please review how numbers above four behave, they use the singular verb.
Why not: Bydlelo tam jich deset nebo jedenáct.
"Jich" is an inconstant clitic with a stronger enclitic status than "tam".