Alok and Bhanu play the following min-max game. Given the
expression N = X - Y – Z
where X, Y and Z are variables representing single digits
(0 to 9), Alok would like to maximize N while Bhanu would
like to minimize it. Towards this end, Alok chooses a
single digit number and Bhanu substitutes this for a
variable of her choice (X, Y or Z). Alok then chooses the
next value and Bhanu, the variable to substitute the value.
Finally Alok proposes the value for the remaining variable.
Assuming both play to their optimal strategies, the value
of N at the end of the game would be
• 4
• -18
• 9
• 2
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Two trains 200 miles apart are traveling toward each other along the same track. Two trains have the same speed 100MPH. A bee is hovering just above the nose of the first train. It buzzes from the first train to the second train, turns around immediately, flies back to the first train, and turns around again. It goes on flying back and forth between the two trains until they collide. If the bee's speed is twice the speed of two trains, how far will it travel?
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