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6 votes
1 answer
41 views

Are you radical enough to solve this SURDOKU?

0 votes
0 answers
51 views

decode the hiring puzzle?

1 vote
8 answers
827 views

Find a more elegant explanation for the sequence 01, 10, 13, 20, 25, 30, 37, 40

13 votes
2 answers
5k views

123456789=1 problem

5 votes
2 answers
403 views

8x8 grid with no unmarked L-pentomino

2 votes
1 answer
149 views

What is this enigmatic IT?

1 vote
1 answer
133 views

Revealing the least helpful of three numbers

1 vote
0 answers
127 views

Why is "domesticate" the answer to “Tame comedies and West End” production?

9 votes
3 answers
513 views

Fill the grid subject to product, sum and knight move constraints

0 votes
0 answers
97 views

What did the Iranian commander order?

11 votes
1 answer
557 views

Pentomino - is there any solution with the straight-bar piece in the middle of a rectangle?

1 vote
1 answer
127 views

Problem solving 6 piece plastic puzzle

5 votes
1 answer
774 views

Just another basic puzzle

11 votes
1 answer
380 views

Different letters, different grids

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