Question

Each of them ____(own/owns) a bicycle.​

Answer 1

Answer:

Each of them owns a bicycle

Explanation:

This is because it is talking about each person

for 1 person we use "s" eg: He plays football

she eats fruits etc.

Answer 2

Owns

Explanation:

Here the question is about possessive pronouns. Since, we know pronouns are the words that are used in place of nouns e.g. He, she, it, they, them etc.

Own here is a  possessive pronoun which shows the possession. While using possessive pronoun with a singular we add "s" or "es" with it but use it as it is with plural.

People get confused in these type of sentences because of "them". They think it is plural. But if you take a closer look, it is singular e.g. each of them

So, the correct sentence would be

Each of them owns a bicycle.