Fill in the grid with numbers from 1 to X, where X is the size of the region. You can’t repeat digits within a region, or in orthogonally adjacent cells. Numbers outside the grid are the sum of digits in that row or column.
Created in 2009 by the Math 2.0 Interest Group, Math 2.0 Day celebrates the meeting of math and technology. Think of all the technological innovations you enjoy – at some point, a mathematician was involved to make it happen. So, to any student wondering where they’ll use math in the real world? Everywhere! Today’s puzzle is From 1 to X, a grid puzzle which involves some light math.
You’re the coordinator for this year’s Secret Santa party. Each of your seven guests brought a present for each of the others. You mixed in the gifts from you, and arranged them in a neat grid, with one present for each guest in each row and column. No idea why – you just liked the arrangement. But then the labels fell off of most of them! Fortunately, you were able to remember a bit about how they were arranged. Can you deduce the rest of the labels?
In Futoshiki, your goal is to fill the grid with numbers from 1-7, without repeating a digit in any row or column. Inequality symbols between cells always point to the smaller number.
Back in my youth, one of the sillier worksheets we used to get in math class was the number comparison worksheet. the teacher used to explain the greater-than and less-than symbols as, “the alligator easts the larger number.” That got me thinking that it would be a fun way to theme a Futoshiki puzzle.
In Gemini Sudoku, you’re given a pair of Sudoku grids. The grid on the right works like a cipher for the grid on the left. Wherever a digit appears in the left grid, it maps to a specific digit in the same position in the right grid. For example 4 in the left grid might map to a 6 in the right grid. This means that for every 4 you discover on the left, you can place a 6 in the same position on the right.
Supposedly, the day after Tax Day in the US is a day of recognition and rest to all the accountants, nicknamed bean counters. Of course, the work is never over, so here’s one more math puzzle for you – Grid Ten.
Fill the triangles in the grid with the numbers 1-9 so that there are no duplicates in any large triangular region or along any stripe of cells, even those that skip over the middle.
Fill the triangles in the grid with the numbers 1-9 so that there are no duplicates in any large triangular region or along any stripe of cells, even those that skip over the middle.
Kakuro is another popular Japanese puzzle. Another popular name is “Cross Sums,” because it functions similarly to a crossword puzzle. Fill in the grid with the digits 1-9.
