3 triangles***/*****
Move 2 matchsticks to get 3 triangles:
You can check your solutions here.
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
In the small village of Traspass-upon-sea, actually some 50 miles from the nearest sea, the four shopkeepers, mr. Baker, mr. Butcher, mr Grocer and mr. Smith held their yearly meeting on the promotion of Tourism.
Of these four men, only mr Butcher’s trade corresponded with his name.
At the meeting, the grocer was the secretary.
James presided the meeting.
Jesse Smith is not the baker.
The treasurer, mr. Grocer, is not called John.
Neither John nor Jack is butcher.
Who was vice president of the meeting? Who is the smith of the village?
You can get a hint
In this post I’d like to introduce TooTs, a mix between crossword puzzles and numbers. The grid looks just like a crossword puzzle, but instead of words the grid has to be filled with numbers. Vertical numbers must be read top-down. Thus if the digits 3, 9 and 5 are listed from the top down, the number would be 395.
Every clue consists of three numbers. Two of them have to be added together to get the number to be filled into the grid.
Example: the clue is 7, 8 and 13. Then the solution is either 7+8=15, 7+13=20 or 8+13=21. The name TooT is shorthand for Two out of Three.
Here is a 5×5 exercise:
|
Horizontal 1) 16, 17, 18 3) 20, 26, 36 4) 142, 139, 145 8) 6819, 20002, 30134 11) 18, 20, 22 12) 11, 24, 36 |
Vertical 2) 17, 19, 23 3) 18, 36, 47 5) 400, 406, 418 6) 18, 106, 256 7) 15, 25, 190 9) 1, 51, 61 10) 11, 12, 13 |
A 7×7 exercise:
|
Horizontal 1) 16891 18930 6) 382, 23, 67 8) 25, 8, 17 10) 32, 14, 17 11) 2913476, 173823, 1876543 12) 61, 23, 38 13) 45, 11, 34 14) 865, 249, 444 16) 13947, 1171, 5419 |
Vertical 2) 53, 26, 27 3) 8843269, 332160, 345612 4) 22, 3, 5 5) 12263, 5321, 6942 7) 62652, 23487, 39165 9) 591, 109, 482 10) 374, 25, 98 14) 83, 16, 26 15) 54, 17, 27 |
You can check your solution here and here
A 9×9 puzzle:
|
Horizontal 1. 108, 132, 146 4. 2, 166, 660 6. 2497, 9892, 12837 9. 0, 7, 24 11. 212, 669, 774 12. 4, 19, 30 13. 18, 27, 27 15. 14, 33, 40 16. 242, 977, 2236 17. 596, 903, 2770 18. 25, 31, 52 20. 4, 11, 22 21. 7, 9, 35 22. 126, 343, 422 24. 3, 10, 13 26. 2918, 74181, 82214 28. 292, 320, 398 29. 66, 191, 228 |
Vertical 1. 38, 96, 224 2. 4, 41, 77 3. 239, 1644, 4146 4. 19, 29, 35 5. 3, 7, 227 7. 20, 36, 38 8. 1, 14, 17 10. 12591, 13966, 31881 12. 706, 10961, 36955 14. 186, 210, 367 15. 102, 153, 279 19. 2287, 3330, 3945 21. 112, 239, 304 22. 19, 26, 45 23. 6, 23, 87 25. 74, 299, 315 26. 33, 49, 52 27. 12, 12, 12 |
You can check your solution here and here
In a subsequent post, probably next month, I hope to publish some variations.
Replace every letter by a digit to get correct additions.
Cookies 1**/*****
Cookies 2****/*****
You can check your solutions here and here
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
What comes next?****/*****
1,000, 1,000,000,000, 20, 100, 1, 4, 8, 3, ?
You can check your solutions here
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
This puzzle is a free translation of an AIVD (Dutch sister of NSA) puzzle in 2012.
Days – 1**/*****
Days – 2****/*****
You can check your solutions here and here
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
Surface***/*****
These 6 matches enclose an area with size 2 (2 standard triangles).
Rearrange them so that:
a) they enclose an area of exactly 4 triangles
b) they enclose an area of exactly 6 triangles
You can check your solutions here.
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
Flags of countries (2)**/*****
Which of the following three flags belongs to the group above:
You can check your solutions here
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
This time I present to you two cryptarithm: calculations in which every digit has been replaced by a letter.
Months 1****/*****
Months 2***/*****
You can check your solutions here and here
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
Calcdoku problems, also called K-doku or Calcudoku were invented in 2004 by Japanese math teacher Tetsuya Miyamoto, who intended the puzzles to be an instruction-free method of training the brain. He used the Japanese name KenKen, which could be translated as ‘Cleverness’. In his classes, he sets aside about 90 minutes each week for solving puzzles. He believe that when students are motivated, they learn better, and he lets them do so at their own pace.
Other names used for this type of puzzle are Kendoku and Kashikoku naru Puzzle. The names KenKen and Kenduko are trademarked. Books are in Japan published by Gakken Co. In the USA the New York Times started publishing them in 2008. In my native Netherlands they appear regularly in both puzzle magazines and general magazines.
A calcudoku puzzle consists of a latin square – a latin square can have any size. If its size 4, the numbers 1 to 4 should appear exactly once in every rown and column exactky once. Similarly, if its size 5, the numbers 1-5 should appears exactly once in every row and column.
The square is subdivided into smaller areas, and the sum, product, difference or division result is given in the top left corner.
Here are two example puzzles.
1) 4×4**/*****
You can check your solution here
2) 5×5**/*****
You can check your solution here
3) 6×6****/*****
is an example puzzle, kindly offered by Jacques Min, who runs a website specialized in Calcudoku puzzles: :
Techniques for solving them:
* http://www.conceptispuzzles.com/index.aspx?uri=puzzle/calcudoku/techniques
*
You can check your solution here
New puzzles are published at least twice a month on Friday. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.
justpuzzles 