Forgetful Fran
Help Fran remember how much money she loaned each friend.
Author Archive for: corrill
Entries by InterMath
Measuring Exact Amounts
Can you produce exactly 3 gallons of water?
The Horse Problem
How much does a man make or lose in the horse-trading business?
Paying for Lunch
What happened to the other dollar?
Magic Circle
Make the sum of all rows equal the same number.
Magic Hexagon
Make the sum of each of the rows equal certain numbers. In the hexagons below, place the numbers 1-19 so that rows, columns and diagonals all add up to 38. (Source: Eric W. Weisstein) Extension: Place the numbers 1-19 in the circles so the sum of each of the rows with three circles around the […]
Magic Square
Make the sum of the numbers in the rows, columns, and diagonals of a grid all equal the same integer.
Calendar Math
Will the sum of four numbers always be the same?
Those Numbers Below
Consider the use of the word “below” for negative numbers.
Cryptorithms
Translate letters into numbers.