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How should I phrase a question that must be answered with an ordinal number (e.g., the third prime)?
Framing a question to which the answer is an ordinal number
How to ask a question to get a cardinal number answer

Assume that there are 5 apples must be eaten by Jack. When you want to know about how many of the apples are eaten, you may ask Jack, 'how many apples have you eaten?'; But how can I ask the question to make Jack answers, 'I'm eating the fourth apple'?

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marked as duplicate by Matt E. Эллен, Urbycoz, RegDwigнt May 4 '12 at 8:57

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

The social and linguistic context would usually make clear what was meant if you asked Jack 'Which one are you on now?'

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