Dear student,

If this is you school/college class test examination the write an application to the concerned authority of your institute for this and recheck you paper.

If this is your university or board examination the go to the official website of that institute , then you will surely find the options for rechecking your papers . Then fill the forms required for that, sometimes it took some fees for that. After then submit that form with following all the guidelines and wait for the result.

Thank you.