Here’s one (admittedly clunky) way to do it (I’m decidedly not a Powerpoint expert):
1-Start with a slide that is formatted to just contain a title. The remainder should be empty space.
2-On your slide, make two textboxes for each item; you’ll need one for the number and one for the corresponding answer. I’d recommend that you draw one textbox, then copy & paste it till you have enough. You’ll want to use the first n textboxes for the numbers, and the second n for the answers.
3-Resize and line up the textboxes. To move the textboxes, it will probably be easiest to click on the border to select the textbox object, then use your arrow keys to move it.
4-Type in the textboxes to fill in the numbers and answers, then format the text appropriately.
5-Click in the text for answer #1, then click the textbox border to select the textbox object. Right-click, and select “Custom animation”. The “Custom Animation” pane will appear. Note that there’s a big empty listbox that takes up most of the space.
6-Click the “Add Effect” dropdown, then expand the “Entrance” menu. This will give you a variety of different entrance effects. I like “Dissolve In” (you may have to select “More effects” to get this the first time). Select the effect you want. You’ll now see an item in the previously-empty listbox in the “Custom Animation” pane.
7-Note the dropdown arrow to the right of the new item. Click it, then select “Effect Options”. A dialog for the effect will appear.
8-Click the “Timing” tab.
9-Click the “Triggers” button. A pair of radio buttons will appear.
10-Select the “Start effect on click of” radio button, then click the dropdown. Select the “Shape <number>” item for number 1. (This is why you want to have the textboxes in that specific order; it’ll make this step easier.)
11-Click OK. The dialog will close, and you’ll now see a new “Trigger” item in the listbox in the “Custom Animation” pane.
12-Repeat steps 5-11 for the remaining “answer” textboxes.