Prof. Giray Okten

Monday, February 16, 2009

Week 2 - Problem 1

The square in the figure is a mini-sudoku: the numbers 1, 2, and 3 must be written in the cells so that each of them appears in each row and in each column. Harry started to fill in the square. In how many ways can he complete the task?

A) 1 B) 2 C) 3 D) 4 E) 5

8 comments:

  1. I agree.
    Is it like:
    132
    213
    321
    that?

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  2. This comment has been removed by the author.

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  3. I thought it was A. You have to fill three in the bottom right hand corner and then the bottom middle has to be 2 and the top middle has to be 3 and the rest falls into place.

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