I've done some calculations on the odds of seeing all of the question by a particular games.
Let's assume the same question will not come up twice in the same game. The odds of a particular question not appearing in N games is
.99^N
Thus the odds of a particular question appearing in N games is
1 - .99^N
There are 700 questions so the odds of seeing them all should be
(1 - .99^N)^700
I used the calulator build in the the google search to get these probabilties for N games
400 3.11421585 × 10-6
500 0.00990699129
600 0.185345398
700 0.539836362
800 0.798043636
900 0.920751096
1000 0.970231549
1100 0.988999416
1200 0.995959325
Disclaimer: It's been 20 years since I took a stats course, so my calculations may be completely out to lunch.