Saturday, January 17, 2009
Peter has a robot , if he press 'A' key of the robot ,it moves 1 step forward.If he press 'B' key of the robot, it moves 2 steps forward.If he press 'C' key of the robot it moves 3 steps forward.
If Peter wants the robot to move forward 1 step, there is only a way.
If Peter wants the robot to move forward 2 step, there are 2 way.
a)Peter wants his robot to move forward 10 steps, how many way(s) can the robot move forward ?
b)Peter wants his robot to move forward 15 steps, how many way(s) can the robot move forward ?
If Peter wants the robot to move forward 1 step, there is only a way.
If Peter wants the robot to move forward 2 step, there are 2 way.
a)Peter wants his robot to move forward 10 steps, how many way(s) can the robot move forward ?
b)Peter wants his robot to move forward 15 steps, how many way(s) can the robot move forward ?
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This question is too hard and the medium question is too easy.
ReplyDeleteIs it 56 ways?
ReplyDeleteI think this question has got something to do with a sequence...
there are 200+ ways
ReplyDelete