He'd get full marks for persistence, but that's not a qualification that would mean very much to Shiv Charan Yadav.
The 73-year-old Indian farmer has been taking - and failing - his high school exams every year since 1969 and has just flunked again for the 38th time.
"Once I pass I want to get married to a girl who's under 30," said Yadav.
He is now revising for his 39th attempt next year.
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