On the campus of

## Green Wall Challenge #1

This first problem comes in two parts, and a bit of mind reading. The parts are different in obvious ways. Solve them both, then read my mind, to do this you may have to ponder for a while the nature of the two parts of the challenge already completed. The winning solution will describe accurately what it is I am aiming for. It isn’t terribly deep, so give it a go in the spirit of fun and joy it is meant. First Problem The Lion, Llama, and Lettuce tri-lemma. There once was a farmer who was taking three items to ...

# Arrangement Puzzles

### The Fifteen Cent Flip

The Puzzle Corner activity this week comes from the great puzzlist Martin Gardner. In his book Perplexing Puzzles and Tantalizing Teasers, this game appears with the title The Dime-and-Nickel Switcheroo. Six squares are shown forming a two by three rectangle. In every square but one a coin is to be placed three pennies, one dime, and one nickel. The… Continue Reading

### Coin Capers

The Puzzle Corner this week has two versions which are variations of a common theme in manipulation puzzles. In each game the goal is to switch the position of two or more sets of coins by moving them within the spaces provided. Coins may only move into adjacent empty spaces. No jumping is allowed, but… Continue Reading

### A-Point-ing Pennies

This week’s Puzzle Corner activity is a one-person game with a fascinating history that goes back thousands of years and spans three continents. Dominic Olivastro, in the book Ancient Puzzles, notes that archeologists found three curious etchings on the roof slabs of the ancient Egyptian temple at Kurna which date back to around 1400 BCE.… Continue Reading

### April Riddles

This week’s Puzzle Corner activity is a collection of riddles that are appropriate for the week that begins with April Fool’s Day. These riddles are the types of brainteasers loved by mathematicians and other people who enjoy mental challenges. Solving them will take logical reasoning, thinking outside the box, and persistence. These problem-solving skills are… Continue Reading