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 and measure the line segment from Door A . Flip the three coins and do a look up in and measure the corresponding line segment in Door B . Add them together . 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] 
 Measurement 


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


 Segment length in Door A 3.5 cm 3.3 cm 1.4 cm 2.3 cm 4.6 cm 3.1 cm 3.9 cm 4.3 cm


 Segment length in Door B 1.4 cm 2.3 cm 3.1 cm 3.3 cm 3.5 cm 3.9 cm 4.3 cm 4.6 cm

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

 vals[0] 
 Measurement 


 + 3.5 cm 3.3 cm 1.4 cm 2.3 cm 4.6 cm 3.1 cm 3.9 cm 4.3 cm


 1.4 cm 4.9 cm 4.7 cm 2.8 cm 3.7 cm 6 cm 4.5 cm 5.3 cm 5.7 cm


 2.3 cm 5.8 cm 5.6 cm 3.7 cm 4.6 cm 6.9 cm 5.4 cm 6.2 cm 6.6 cm


 3.1 cm 6.6 cm 6.4 cm 4.5 cm 5.4 cm 7.7 cm 6.2 cm 7 cm 7.4 cm


 3.3 cm 6.8 cm 6.6 cm 4.7 cm 5.6 cm 7.9 cm 6.4 cm 7.2 cm 7.6 cm


 3.5 cm 7 cm 6.8 cm 4.9 cm 5.8 cm 8.1 cm 6.6 cm 7.4 cm 7.8 cm


 3.9 cm 7.4 cm 7.2 cm 5.3 cm 6.2 cm 8.5 cm 7 cm 7.8 cm 8.2 cm


 4.3 cm 7.8 cm 7.6 cm 5.7 cm 6.6 cm 8.9 cm 7.4 cm 8.2 cm 8.6 cm


 4.6 cm 8.1 cm 7.9 cm 6 cm 6.9 cm 9.2 cm 7.7 cm 8.5 cm 8.9 cm