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How to solve Videos Forum Timed Rankings Books Specials Print 21 Sep 2017
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 89 times
abcdefgh
1 
8+

4 mod
2 mod

60×

1 mod
2 

0 mod

6-


1 mod

3 
1008×

5
1 mod


13+
4 


2
3 mod
4 mod


5 
2 mod

4-


5 mod

19+
6 

6

5
2 mod



7 
60×

1 mod


2 mod

4
8 

1
0 mod

5

10+

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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