I'm writing a kid's book in which the characters use cards or dice to decide who goes first--and eventually start using the method to determine who has to do certain chores such as washing the dishes. It's supposedly random, but it turns out the father is cheating somehow (perhaps through math). The daughter (12 years old) wonders why she is always losing, and figures out how he is tricking her. (This ties in with themes of the book--the child is being lied to in other ways as well!)
Can anyone help me out? I am not much of a game player myself. The book is a mystery, though, so I want a small example of how she is getting smarter at "deduction."
What method could they use, and how could she use logic to figure it out?
If you can help, thank you so much! :o)