Adjectives are said to agree with a noun when they match the noun's gender, case, and number. In each question below you are asked to decline the adjective bonus, -a, -um so that it agrees with the noun that is given, i.e. so that the form of bonus, -a, -um that you provide has the same gender, case, and number as the noun.
Decline the adjective bonus, -a, -um into the correct form to agree with the following noun:
Since puerōs is masculine, accusative, and plural, you need to decline bonus, -a, -um to be masculine, accusative, and plural so the answer will be: