The McGraw Hill 6th grade book series of games.
Instructions:
Find three coins of different sizes (e.g. quarter, nickle, penny). Flip each and record the head/tail value. Look up the Pattern Sequence . Flip the three coins and do a look up in the Candidate Next Element . Determine whether the next element of the pattern sequence is greater than, less than, or equal to the Candidate Next Element . Your opponent may challenge you. Look up the answer in the table on the next page. If you are right and your opponent didn't challenge you, you get a point. If you are right and your opponent did challenge you, you get two points. If you are wrong and your opponent challenged you, your opponent gets a point. If you are wrong and your opponent didn't challenge you, nobody gets a point. Your opponent plays next. 
 vals[0] 
 FindPattern 


 Coin tosses (largest to smallest):  TTT TTH THT THH HTT HTH HHT HHH


 Candidate Next Number -7 16 -4 81 17 16 -24 10


 Pattern Sequence 3, -3, 6, -9, 15 2, 3, 4, 9, 16 4, 3, 6, 5, 8, 7 2, 4, 3, 9, 4 2, 3, 5, 7, 11, 13 1, -2, 4, -8 1, -2, -1, -3, -4 1, -1, 2, -2, 3, -3, 4

 
  On a different page so the players have to turn to it...