2024年7月17日 · A 4x4 grid of numbers with unique row, column and diagonal ranges. 4. 4x4 square with no increasing ...

2019年12月28日 · According to the 4x4 grid that dot doesn’t exist and therefore it doesn’t really count, but anyway it’s an alternative solution :) $\endgroup$ – user64580 Commented Dec 28, 2019 at 22:34

2020年3月29日 · Now if we assign values according to second grid 1,2 ..16 then the grid will look like below : 972 7 5 52 18 28 x 25 26 22 24 50 9 400 55 4 Now if take second row : 28 - 18 = 10 + 16 =26 - 1= 25 Taking third colmnn : 16 * 5 - 24= 56 -1 = 55

2020年11月9日 · Colored balls are placed in a 4x4 grid. A move consists of swapping two adjacent (horizontally or vertically) balls. What is the least number of moves required to form 4 connected components*, one ...

2019年12月30日 · Can you place every number from 1 to 16 into a 4x4 grid such that the range of every row, column and two main diagonals is a unique value? The range of a row is the difference between its maximum and minimum values (similarly for columns and diagonals). Here is a similar question for 3x3: A 3x3 grid of numbers with unique row and column ranges

2015年2月1日 · Therefore the set S must have initially consisted of one each of the numbers 2, 4, 8, ..., 2^15, 2^16, and the entire 4x4 grid must have been filled. But then the position would have been a losing position, i.e. no two tiles could have combined and there was no space left on the board. Contradiction. 2. Proof that 65536 is theoretically possible.

2020年8月25日 · This is a harder version of this puzzle: A robot visiting every edge of a 3x3 grid. A robot is placed on the top-left vertex of a 4x4 grid. At each move the robot can take one step (up, down, left or right) along the edge of the grid to the adjacent vertex, but he cannot go outside the grid. The robot can revisit vertices and edges.

2021年1月22日 · Paint the cells of a 4x4 grid with 푛 colors, such that every possible tromino found in the grid uses 3 different colors. What is the smallest value of 푛 possible in such a coloring?

The thing to note is that the 4x4 layout is not ordered in any particular way - the items could just as easily be given as an unordered list of 16 items. There are four groups of four items - your job is to identify them.

2023年10月19日 · You are given a 4x4 grid with 3 crosses as shown below. Each turn, you can select a cross and slide it along horizontally or vertically. It will continue sliding until it hits another cross or a wall. Can you get a cross into one of the squares in the central 2x2 subgrid? Bonus: can you get multiple crosses into the central 2x2 subgrid?