All the Eager Zebra Games are good and fun to play. Personally, I would pick Gold Streak, Knockout Trivia and Pick The Price. All these are subject to 200 AVP/month.
For PTP, you need to do a little bit of monitoring/checking on previous won prices, time played etc. Do a bit of mathematics, take the average and enter. You might be lucky.
The rest, testing your general knowledge.
