Featured Puzzle: Calcudoku #1
Calcudoku is the generic name for a Sudoku variant known better by the trademarked titles KenKen or Kendoku. To make things a little easier, I color-coded regions with the same math operation.
Featured Puzzle: Factorism #1 – Practice Your Times Tables!
Brush off your times tables, because I have one more back-to-school themed puzzle for you. In Factorism, your goal is to place the numbers 1 through 9 along the top and left of the grid. Numbers in the grid are the product of the factors for that row and column.
Featured Puzzle: From 1 to X #1
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.
Featured Puzzle: From 1 to X #2 – Happy Math 2.0 Day
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.
Featured Puzzle: Grid Ten #1 – National Bean Counter Day
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.
Featured Puzzle: Index Sums #1 – Hidden Presents
Okay, Mom and Dad are out shopping. Now’s your chance to snoop for presents! The problem is that it involves a bit of math. They must have hidden them based on your last report card.
Featured Puzzle: Index Sums #2
I really liked the concept behind Index Sums puzzles. Do a little mild arithmetic based on the values of rows and columns, and shade the appropriate cells to reach the given totals. I use a chalkboard for the look in several other puzzle types, so why not a whiteboard here?
Featured Puzzle: Kakuro #1
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.
Featured Puzzle: Kakuro #2
February is mostly associated with Valentine’s Day here in the US. So for these first couple of weeks, enjoy the theme of love and lots of pink and red. Kakuro requires some addition to create the sums shown. So, we could say it’s about bringing people together?
Featured Puzzle: Math Ladders #1
The German puzzle Miss Lupun (an anagram of “plus minus”) was the inspiration for today’s puzzle – Math Ladders. Simply change the number at the top of the building into the number at the bottom using the mathematical operations in the circles between floors. Use only the digits 0-9 in four separate columns.