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How to solve Videos Forum Timed Rankings Books PDF Print 16 Jul 2018
Easy:
4×4
5×5
6×6
Killer
Sudoku
Medium:
4×4
6×6
7×7
Sudoku
Difficult:
4×4
5×5
6×6
7×7
9×9
Extra
Difficult 7 × 7, Rating: ★★★★★  Points: 9     Solved 310 times
abcdefg
1 
630×
1 mod

9+

120×

2 


8+

3+
2 :

3 
20×


1 mod


0-
4 


2^

0-


5 
168×


3 mod


6 


1-

0-


7 
4+


24×


2

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.

Note: this puzzle also uses the exponentiation operator ^
Example: 2^3 = 2 x 2 x 2 = 8
Or, with three digits: 2^4^2 = 2^(4^2) = 2^16 = 65536
Note: evaluation is right to left

total
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