by MathPickle | Sep 16, 2015 |
Lazy Lemur Multiplication Let's start with an example. 01746 is good for lazy lemur multiplication because you can multiply it by a digit greater than one so that all five digits get shuffled, but remain the same. Students are lazy lemurs. As soon as they discover...
by MathPickle | Sep 16, 2015 |
Lichen Puzzles (MathPickle, 2013) These are difficult puzzles – not the puzzle you want to start exploring multiplication, but there are rich ideas here that are worthy of exploration. I now call these puzzles Lichen Puzzles… Download printable Lichen...
by MathPickle | Sep 16, 2015 |
Toothpick, Vampire and Domino Sequences (Clifford Pickover, 1994) Recreational mathematics is on the fringes of mathematics, but its real worth is in mathematical pedagogy. Vampire Numbers are a perfect example. They are ridiculous. Most mathematicians would not take...
by MathPickle | Sep 16, 2015 |
Multiplicative Persistence (Gottlieb, 1969) The persistence of an integer is the number of times you can perform the following before ending up at a single digit: 1) Take the digits of the integer and multiply them together to give a new integer. 2) Repeat #1 using...
by MathPickle | Sep 16, 2015 |
Mondrian Art Puzzles People who gaze upon a piece of Mondrian art should ask how he decided which colors to paint where. The disgruntled person may even ask what the piece of artwork might have looked like if Mondrian had taken the time to color it all in… In...
