While these students were found to have obtained over 80 per cent marks in objective type questions -- or 40 and above out of 50 -- their marks in descriptive type questions in the same subjects were less than 5 out of 50.
This prompted the Gujarat Secondary and Higher Secondary Examination Board (GSHSEB) to call them for a hearing.
These 670 students were found to be lacking in basic knowledge in their subjects in which they got high marks in objective type questions, following which the GSHSEB failed them in those subjects.
"As many as 670 students obtained more than 80 per cent marks in objective type questions (OMR format), but scored less than 4-5 marks out of 50 in descriptive type questions. This helped them obtain passing marks in the subject, but we have decided to fail them," said GSHSEB officer on special duty M M Pathan.
Similar cases were found even last year and most of the students came from Dahod, Mahisagar and Tapi districts.