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 2-D number guessing. (Posted on 2013-09-23)
I often play the higher-lower game with my students. I randomly generate a number 1 to 1000 and give a student 10 guesses. After each guess I tell them whether the number is higher or lower. With good mental math skills a student should always win.

This is a new variant:
I pick two numbers from 1 to 1000 and create an ordered pair. The student guesses coordinates and I tell them both (east/west/neither) and (north/south/neither).

How many guesses should I give?

 No Solution Yet Submitted by Jer No Rating

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10 guesses will do, the coordinates are independent and may be treated as two skilled students , each providing  a question directed to  "cage" his co-ordinate.
 Posted by Ady TZIDON on 2013-09-23 14:11:14

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