Assistance with Excel Data

Hi All,

My knowledge of excel is basic but I was wondering if anyone could provide some feedback with a problem. I'm working with a spreadsheet that contains questionnaire data that was originally scanned. When matching the answers on the questionnaire with the spreadsheet I found some errors (the scanner marked numbers that weren't checked off). I've been going through each survey one by one and then checking the row in excel to see what is correct and what needs to be erased but there are over 300 participants.

Is there a formula or function I can use that will find and display the questions answered (marked by "1")? And if so, is there a way I can tell it to make the ones marked incorrectly blank?

I'm sure I'm not explaining the problem correctly and I apologize. The vertical row is marked 1-258 and the ID's of the participants are displayed horizontally. For example if the first person only checked off one item and the spreadsheet shows multiple items checked off is there a formula I can use to ask it to make the incorrect items blank? Or a formula that will put a "1" in certain rows? That might be easier since I have the surveys and know which numbers need to be selected.

Any help would be appreciated!!