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How to solve Videos Forum Timed Rankings Books Print 22 Feb 2018
Easy:
4×4
5×5
Sudoku
Medium:
4×4
5×5
6×6
8×8
Killer
Sudoku
Difficult:
4×4
5×5
6×6
8×8
12×12
Extra
Difficult 8 × 8, Rating: ★★★★★  Points: 8     Solved 34 times
abcdefgh
1 
24+

3-
2
4 mod

2-

2 



9+
1 mod
1 mod
12+
3 
7
5+
6





4 
0 mod

1-
5
1-

13+

5 

1-

3 mod


4 mod

6 


1-

10+

1 mod

7 
13+


28×

144×

1
8 

8 :


7

1 mod

Note: this puzzle also uses the modulo operator mod
a mod b = r means that when dividing a by b, the remainder is r. For example, 5 mod 2 = 1, and 3 mod 5 = 3.
Look here for some more explanations.

total
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