september-2011

SUDOKU
Grab a pencil, put on your thinking cap and join the craze!
INSTRUCTIONS
The objective of Sudoku is to fi ll in the
missing squares so that each row, column and
3x3 box contains the numbers 1 through to 9.
To get you started, here are a few tactics...
Scan each horizontal and vertical band
consisting of three 3x3 boxes. It’s often
easiest to start in a spot with the most
numbers already given. If you can fi nd the
same number in two rows, you know that
number must be in the third (the same goes
1EASY
9 4
1 3 5 9 5
7
3 8 9
2 7 6
6 3 8
1 6
3 5 7 8 4
6 8 7 5 9
for columns). Now see which intersecting
rows and columns can be eliminated because
they also contain that number. (This method
is called slicing and dicing.)
Some Sudoku fans like to pencil in
possible answers in the corners of individual
squares. Once you have a few numbers fi lled
in, you may also fi nd it handy to jot down a
list of missing numbers for each row, column
and box.
2MODERATE
8 7
2 8 3 1
4 9
5 6 3 7
6
9 8 1 6
7 4 5 3
2 7
1 4 5 2
2 MODERATE
1 3 6 8 9 7 4 2 5
4 9 7 2 5 6 8 3 1
2 5 8 4 1 3 7 6 9
5 6 3 1 4 2 9 7 8
7 8 1 5 6 9 3 4 2
9 4 2 3 7 8 1 5 6
8 7 9 6 2 4 5 1 3
3 2 5 7 8 1 6 9 4
6 1 4 9 3 5 2 8 7
1 EASY
2 5 9 7 6 1 3 4 8
6 3 7 8 4 2 9 1 5
1 8 4 3 5 9 6 2 7
7 4 3 6 2 5 8 9 1
8 9 2 4 1 7 5 3 6
5 1 6 9 3 8 4 7 2
9 7 5 1 8 4 2 6 3
3 2 1 5 9 6 7 8 4
4 6 8 2 7 3 1 5 9
BRAIN TEASERS //
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