I'm not sure about the proper subject verb agreement in the following sentences.
A boy and a girl make/makes a couple.
5 and 5 make/makes 10.
75 and 25 make/makes a hundred.
Can you help?
ETA: I understand that compound subjects usually take plural verbs, unless they form a collective idea- in which case it takes a singular verbs.
Can the subjects in these cases be considered a collective unit?