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How to solve Videos Forum Timed Rankings Books  PDF Print 23 Apr 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 249 times
abcdefg
1 
60×


1-


2 
10+

15+

49^
2-
14+
3 
252×


3-



4 


7+

16807^


5 
7 :


0 mod


2 :
6 


12×

4 mod


7 
11+



3 mod

7

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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