Step 1: Put the Flash movie and your PowerPoint presentation in the same folder.

Step 2: Open “PowerPoint Options” and check the option that says “Show Developer Tab in the Ribbon”

Step 3: Click the icon in the “Developer Tab” that looks like a tilted hammer (highlighted in red) and select “Shockwave Flash Object” from the next window.

Step 4: Draw a rectangle using your mouse on the PowerPoint canvas, right click and select “Properties”.

Step 5: Typing the name of the SWF file in the “Movie Property”. For instance, it’s “XXX.swf”. If the presentation and the quiz are not in the same folder, we need to type in the full path of the SWF file.

Then your Flash movie is embedded in the presentation.
Hope it helps and good luck!=)

Reference:
PowerPoint Quiz Maker-Use Flash Quiz to Brighten up Your Presentation
4 Effective Ways to Publish PowerPoint on Web