To find out which edition of Excel 2010 or 2013 you are using, click File. From there, it’s different.
Click Help and look on the right of the window under About Microsoft Excel.
Excel 2010 32-bit
Excel 2010 64-bit
Click Account, then About Excel.
This displays the About Excel window. The edition of Excel is shown on the top line.
Excel 2013 32-bit
Excel 2013 64-bit