Larry N. Campbell

A couple of (hopefully) easier ones for you.  Answer either or both. What is the value of this fraction?  (6 – 9 x 7) / (6 + 4 x 3) A palindrome is a number (of more than one digit) that reads the same forwards and backwards.  How many palindromes are there between 1 & […]

SOLUTION: 1. Fill the 3-gallon jug and pour it into the 5-gallon jug.  2. Re-fill the 3-gallon jug and pour it into the partially-filled 5-gallon jug.  3. When that jug is full, what remains in the 3-gallon jug will be one gallon.

1.  How many natural numbers are between the square roots of 8 & 80? 2. What’s the largest three-digit number divisible by both 7 & 9? ***** BONUS:  How many nonzero perfect squares can be displayed on an eight-digit calculator?

HOPEFULLY-EASY RIDDLES? Let’s try to make up for the over-complicated Puzzle from last time!  Here are some good old standard riddles. (Perhaps you’ve heard some of them?)  For this Puzzle, answer ANY ONE of them and get credit (and recognition :-)).  Extra credit for more than one answer!   SOLUTIONS ARE IN GREEN BELOW: 1.  If […]

The Amazing Matching Birthdays Fact QUESTION:  Suppose you are in a gathering that includes, say, three dozen folks.  How likely is it that two of them have the same birthday? Well, as it turns out, relatively decent!  For now, you’ll have to take my word for it (ask if you want details), but it’s true:  […]

Apparently, one needs to click here:    no humor signs

PUZZLER VI: What Error is in This Picture?  (You may ignore the 0:10 ‘timer’ embedded in the shot.) SOLUTION: There were a few believable ‘errors’ suggested for this one, but all submitters also included the ‘obvious’ one, namely that June does not have 31 days, as suggested on the calendar in the picture.   BONUS […]

The Amazing “Knight’s Tour” (Semi-) Magic Square Quick Background/Review: A magic square is a square array (of any size) of consecutive counting numbers where all the rows, columns, and diagonals add to the same number.  A simple 3 x 3 example is shown to the right.     An 8 x 8 Square with an Incredible Feature: […]

BONUS PUZZLER(s) for DECEMBER Here are a couple of arithmetic puzzlers to tide us over until January.  Solve EITHER or BOTH and send along your solutions.