All Questions
15 questions
7
votes
1
answer
606
views
Fill this Sudoku variant so that the sums of numbers in the outlined regions are all different
Place numbers in the grid so that each row and each column contain all the numbers {1,2,3,4,5} (each exactly once) and the sums of numbers in the outlined regions are all different.
Attribution: ...
- 21.4k
8
votes
3
answers
823
views
Fill the grid with numbers to make all four equations true
Using all the numbers {1,2,3,4,5,6,7,8}, each exactly once, fill each empty white square with a number so that all the horizontal and vertical equations are true. The grey squares are not used.
...
- 21.4k
4
votes
4
answers
887
views
Fill a grid with numbers so that each row/column calculation yields the same number
Using all the integers 1 through 9, each exactly once, put a number into each square in the grid below so that the result of each row and column calculation is 5.
All operations are performed "...
- 21.4k
10
votes
2
answers
629
views
Fill the triangular grid using the digits 1-9 subject to the constraints provided
Fill the grid using the digits 1-9 four times each. No row or column can contain the same digit more than once. The total of each row and column is provided, as well as clues to the numbers forming ...
- 21.4k
31
votes
1
answer
4k
views
Are you radical enough to solve this SURDOKU?
All "surds" represent whole numbers smaller than 15, and the same number is never used twice with the same index. (It's a sudoku.)
Attribution: PUZZLEBOMB.co.uk. Puzzles by @stecks & @...
- 21.4k
15
votes
4
answers
959
views
Fill the grid subject to product, sum and knight move constraints
Using the numbers 2, 3, 4, ... 19 each exactly once, fill some of the empty squares in the grid with a number so that the product of the numbers in each row is as shown, as is the sum of the numbers ...
- 21.4k
0
votes
2
answers
432
views
A 4x4 sudoku shouldn't be that hard, right? Right?
Note: this is not in conjunction with my Minesweeper puzzles
Got this idea from one of Cracking the Cryptic's videos, I don't remember which one though. This exact puzzle is still overall unique.
...
- 2,867
15
votes
1
answer
1k
views
Trust me: you do not want to go down this road with me
Every cell has a digit from 0 to 9 or one of the four operation symbols +, −, ×, and /, signifying addition, subtraction, multiplication, and division respectively.
No digit appears more than once in ...
- 13.3k
3
votes
2
answers
470
views
Stuck on hard Kakuro
I‘m stuck on this Kakuro. Does anyone have any hints how to proceed? Thanks!
- 31
4
votes
3
answers
2k
views
Finding a Kakuro trick
The following screenshot is taken from the Android app Kakuro++ (level 9 riddle 12)
And I verified the current status within the app. I managed to solve the puzzle by guessing a 50/50-number and ...
- 642
2
votes
5
answers
876
views
Can you fill the cells by integers? [duplicate]
Can you fill the cells with integers so that all the equalities must be true?
- 1,703
25
votes
3
answers
2k
views
Ever heard of a W-Sudoku?
You may have heard of a type of Sudoku called an XV-Sudoku. In such a Sudoku, cells connected with an "X" must sum to 10 and cells connected with a "V" must sum to 5. In this W-...
- 8,890
4
votes
1
answer
679
views
Albrecht Durer Inspired Magic Square
A magic square is an n-dimensional matrix in which each row, column, and main diagonal sums to the same 'magic number' (denoted by s). A normal magic square uses each of the numbers from 1 to n ...
- 43
8
votes
2
answers
3k
views
Can you solve the 7x7 (sudoku-ish) centered sums puzzle
I have come across this puzzle a few times in competitions and rally's, and it has troubled me because I cannot seem to find a good approach to solving it, either programmatically or numerically. And ...
- 183
-2
votes
7
answers
19k
views
2x2 row and column equations
Rules: No paper or notes, but a calculator is accepted.
Post the exact time min wise of how long it took.
And obviously give the answer.
- 569