Red & Black Card GameTask 47 ... Years 4  8SummaryPlayers shuffle and share a pack of cards. The game they play, each using their half deck, is about adding and subtracting the value on the cards, beginning at zero. Players take turns to add their top card to the pile. Red cards subtract, black cards add, so negative numbers are possible. Player A wins if the total reaches ^{+}15 or more. Player B wins if the total reaches ^{}15 or less.The initial challenge is from the viewpoint of a game manufacturer who wants a game which takes, on average, 10 cards to finish. That is, 5 turns each for a round. What should the target number be to achieve this? 
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IcebergA task is the tip of a learning iceberg. There is always more to a task than is recorded on the card. 

Whole Class InvestigationTasks are an invitation for two students to work like a mathematician. Tasks can also be modified to become whole class investigations which model how a mathematician works. 
You will need a pack of cards for each group (perhaps pairs). The advantages of a whole class investigation based around the iceberg questions above are the speed with which lots of data can be collected and the valuable contributions to discussion made by a broad crosssection of students. Also, if you go as far as the design project suggested, you will produce some great display work and potentially achieve many learning outcomes in literacy, IT and art. For more ideas and discussion about this investigation, open a new browser tab (or page) and visit Maths300 Lesson 89, Red & Black Card Game. 
Is it in Maths With Attitude?Maths With Attitude is a set of handson learning kits available from Years 310 which structure the use of tasks and whole class investigations into a week by week planner. 
The Red & Black Card Game task is an integral part of:
The Red & Black Card Game lesson is an integral part of:
