If you bubbled the correct set number but forgot to write it on the answer sheet, your copy is likely to be checked, as examiners primarily rely on the OMR bubbles for evaluation. However, if the set number is missing in both the written and bubbled sections, it may create confusion, potentially leading to disqualification or incorrect evaluation. Rules vary by exam, so if possible, contact the examination authority for clarification. In most cases, properly bubbled answers are prioritized over written details.