Names and Numbers

On the last Monday of the term in one Maths class the teacher has asked a question and is listening carefully as the pupils give their answers.

“Fifty-six,” says Elvira

“Two hundred,” says Rebecca

“Fifty-nine,” says Felix

“One thousand,” says Tom

“Five-hundred,” says Fred

“Ninety-nine,” says Nick

“One,” says Rhianna

“Well done,” says the teacher, “you are all right, including Clive.”

What answer did Clive give?