Pull up the PPT in reading view and screen share it with your client.
If your system allows,, pull up your own so that you each can mark the page without the other seeing.
Tell your client to choose one of the people by number (1-30 from upper left to lower right)
You do the same. You can write it down if you want.
Take turns asking YES/NO questions to help you eliminate until you have it narrowed down to one. Examples of questions:
Is it a woman?
Is her hair red?
Does her shirt have a collar?
Based on the answers, each of you will continue to eliminate (deduce) until you arrive at the best guess. The goal is to guess it first.
If you can do so on your system you can cross out the ones you are eliminating right on the screen. Each of you should ideally do this separately; you can do it on the same screen also, using different color "ink"
Measure success by counting how many questions it takes to make a correct guess. Start with the "10 men" PPT and progress to the more difficult ones as the student improves. The “F” number on the title page will always indicate how many pictures are in that lesson.