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Top Questions

4 votes
0 answers
51 views

The shortest way from A1 to B1

8 votes
0 answers
149 views

Something above

0 votes
2 answers
103 views

Weighing Coins -- a Different Approach

14 votes
4 answers
918 views

What is the maximum number of people who speak only 1 language?

10 votes
2 answers
461 views

Is it possible to have a double miracle Sudoku grid?

-2 votes
1 answer
81 views

Can you use triangular tiles to form a rectangle of size 2016 cm by 2021 cm?

2 votes
0 answers
57 views

Whose turn is it?

5 votes
1 answer
283 views

Swap the positions of the 4 chess knights

2 votes
1 answer
98 views

Circular Hedge Maze

0 votes
0 answers
70 views

In the rims of hell, A river flows

6 votes
0 answers
281 views

"Many tries will turn failures Ƨ successes"

2 votes
1 answer
181 views

Hold out to the bitter end

10 votes
1 answer
409 views

"Shining Composer"

3 votes
3 answers
549 views

Knights, Knaves, and Spies

7 votes
1 answer
492 views

A Professor's Presentation

4 votes
1 answer
311 views

Largest prime number erroneously erased when finding all primes less than 1000

0 votes
1 answer
79 views

Identify the truth teller, the liar and the spy

4 votes
2 answers
474 views

Maximizing row and column products in a 4x4 grid

6 votes
1 answer
614 views

Determine if N is zibbable [closed]

17 votes
1 answer
1k views

Just the two of us

6 votes
1 answer
355 views

Impressions – a cryptic crossword

11 votes
2 answers
2k views

Signature doughnut from a city

7 votes
1 answer
362 views

Colombian Sudoku, Cows and Bulls again…

0 votes
0 answers
174 views

Alternate 100 Blue Eyed Islanders Riddle Conclusion - Contradictory Laws

5 votes
2 answers
455 views

Can white checkmate in 1 move?

6 votes
2 answers
745 views

What is a Pisa Word™?

5 votes
1 answer
577 views

What were the last three single moves?

30 votes
1 answer
4k views

Are you radical enough to solve this SURDOKU?

-3 votes
0 answers
120 views

Are the Polybius cipher and the Bifid cipher really easy to solve?

8 votes
1 answer
403 views
+500

V.I.P. Club for Stars

1 vote
0 answers
91 views

Can black and white cooperatively put a stalemate to black in 16 moves (under ser-h conditions)?

8 votes
1 answer
308 views

Rectangular representation (ignore the nonsense)

11 votes
1 answer
2k views

What's the price of banana?

4 votes
3 answers
818 views

Eliminate some numbers so that each of the three rows contains the numbers 1 through 9 each exactly once

10 votes
2 answers
571 views

Fill the triangular grid using the digits 1-9 subject to the constraints provided

3 votes
1 answer
371 views

What tree am I?

28 votes
1 answer
1k views

Go the Distance

13 votes
1 answer
666 views

Given a special name

11 votes
8 answers
4k views

Can you arrange 25 whole numbers (not necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd?

2 votes
1 answer
274 views

Find the missing animal

14 votes
3 answers
800 views

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

5 votes
2 answers
867 views

8x8 grid with no unmarked L-pentomino

11 votes
1 answer
748 views

Scully’s foot fungus cream – A who-has-done-this crossword

2 votes
1 answer
278 views

Destroying Democracy

1 vote
0 answers
173 views

Who is my greatest nemesis?

4 votes
4 answers
519 views

Revealing the least helpful of three numbers

2 votes
1 answer
210 views

Please find the next number in this sequence: 121, 25, 36, 49, 16, 9,?

6 votes
2 answers
1k views

11 trees in 6 rows with 4 trees in each row


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