On the campus of

Divergent Thinking Puzzles

A Touchy Situation

I am indebted to Robert Benjamin, a scientist from the Los Alamos National Laboratory, for A Touchy Situation. Bob first did this activity with his son when his son was in kindergarten. Therefore, he feels that the activity is appropriate for students at all grade levels. He also notes that the activity works best if students use… Continue Reading

Relative Reckonings

Relative Reckonings

This week’s Puzzle Corner activity comes from the field of recreational mathematics where people do math just for the fun of it. One of the areas of recreational mathematics is logic. Logic puzzles are usually challenging and are normally resistant to quick and easy solutions.The puzzle presented here, Relative Reckonings, is no exception. This puzzle… Continue Reading

Shrinking Square Challenge

Shrinking Square Challenge

This week’s Puzzle Corner activity is a seemingly simple one that may prove more difficult than one might expect. In it, students place four pennies on the corners of the square pictured. They are then challenged to move only two of the coins to create a new square that is smaller than the original. Most students will need to… Continue Reading

It’s a Snap!

It’s a Snap!

This week’s Puzzle Corner activity is an adaptation of a classic puzzle from recreational mathematics. It is traditionally posed as a thought problem to be worked out in your head; as such, it is moderately difficult. However, I have found that many elementary school children can solve this puzzle -if they have manipulatives to make it concrete.… Continue Reading

Locating Legs

Locating Legs

This week’s Puzzle Corner activity has a holiday theme. In it, students are presented with a paradoxical scenario and asked to try to make sense of it. In this scenario a child is hiding under a table at her parent’s holiday party. Looking out, she can count 20 legs and thus knows there are 10 adults in… Continue Reading

Family Ties

Family Ties

This weeks’s Puzzle Corner activity is a collection of three riddles all dealing with the relationships between relatives. The first one is thought to be many hundreds of years old and is one of the best known brainteasers of all time. I have chosen to leave it in its original form, even though the style of English… Continue Reading

The Relative Riddle

The Relative Riddle

This week’s Puzzle Corner is a classic riddle requiring reasoning to reconcile. (Please forgive the crude alliteration.) While many of you have encountered this riddle before and already know the answer, the riddle probably caused curious consternation (I beg your pardon once more) the first time you saw it. Riddles like the one presented here… Continue Reading

Alphabetical Puzzlers

Alphabetical Puzzlers

This week’s Puzzle Corner is a collection of puzzles dealing with letters of the alphabet. While they are not necessarily mathematical in nature (although one could argue this point), these puzzles have a place in a well-rounded mathematics curriculum. Alphabetical Puzzlers is a collection of four puzzles that use letters of the alphabet in a… Continue Reading