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How to solve Videos Forum Timed Rankings PDF Print   Solution 3 Dec 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: ★★★★★      Solved 342 times
abcdefg
1 
0 mod

168×

30×

14×
2 
126×

9+

6^


3 

15625^




4^
4 
8^

1-




5 

11+

15+
16+
5-

6 
7^





243^
7 


0 mod

0 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.

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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