Boxing Day is celebrated in many countries around the world, usually the day after Christmas. Originally, it was the day that alms boxes were opened, and the contents distributed among the poor. Today, some of that spirit remains, but it’s also a shopping holiday similar to Black Friday. Naturally, it seemed a good fit for a Fold-a-Box puzzle. Draw walls to create pentominoes to box up the various gifts.
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.
It’s the time of year for every parent’s favorite task. Figure out how to wrap oddly-shaped packages! Of course, for this puzzle, the boxes are invisible! Each bow is already in place, and you must draw the border lines to reveal all the presents.
It’s a starry night, and the sky is filled with galaxies. In this puzzle, divide the grid into irregular regions with a galaxy at the exact center.
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.
Gokigen Naname, commonly shortened to just Gokigen, is a line placement puzzle. Place a slanted line into each cell, following numbered clues at grid intersections.
