If your answers are clear, concise, and well-structured, the examiner might be able to understand which question you were attempting to answer based on the content itself. This would minimize the impact of missing question numbers.

Some Anna University exam papers might have specific instructions regarding question numbering. If the instructions explicitly stated that question numbers are mandatory, the omission could lead to deductions in marks.

Ultimately, the examiner has some discretion in evaluating your answer sheet. If they're unsure about which question you were answering, they might award partial marks or no marks at all for that particular question.

The best course of action is to reach out to your department as soon as possible. Explain the situation and see if there's anything you can do to rectify it.

If contacting the department isn't possible, there's not much you can do at this point except hope that the clarity of your answers helps the examiner understand your intent.

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I hope it helps!