These are small black boxes or crosses at the four corners of the PDF. Scanners use these to align the sheet. Without proper registration marks, your scanner will reject the sheet.
You can find various formats of 40-question OMR sheets on academic sharing platforms. These typically include columns for name, class, and 40 multiple-choice bubbles (A, B, C, D). kertas omr 40 soalan pdf
Modern educators often use digital tools to process these sheets: Traditional Scanners: These are small black boxes or crosses at
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