Subtracting dice Bingo
The game rules
∙The values called in this game of bingo will be determined by subtracting the numbers showing on a pair of normal 6sided dice. The subtraction willalways be the bigger value subtract the smaller value. There will be no negative values.
∙Players choose 9 numbers. They can be all the same, mostly the same or mostly different. However, if a player chooses to have all nine numbers the same, that number must be called 9 times for the player to win. Players can only cross out one of their numbers each time a number is called.
∙The first player to have all their numbers crossed out is the winner.
Your challenge is to determine the best set of 9 numbers to use in this game.
What you have to do
Enter the formula “the absolute value of [RanInt#(1,6) − RanInt#(1,6)]” into your calculator by pressing the following sequence of buttons: eQ.1SHIFT)6)‐Q.1SHIFT)6)p
Each time you press panother simulation value will be displayed.
Simulate the roll of the dice at least 50 times and record your results in the table.
Number rolled 
Tally
Frequency
0
1
2
3
4
5
What set of 9 numbers do you think are the best set for winning this game?
Write a paragraph to explain the reason for your choice.
In your group, play the game with a real pair of dice. Which group member’s set of numbers wins the most frequently?
© Sue Thomson and Shriro Australia PTY Limited. This page may be photocopied for classroom use.
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