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Featured
Dollar Words and the Numerical Value of Famous Quotes (10-13 thru 10-17)
Posted on October 13th, 2009 by kramer
What are Dollar Words? Assign a cent value to each letter. So, let a = 1 cent, b = 2 cents, c = 3 cents, and so on up to z = 26 cents. For any word, add up the cent values of its letters. If they sum up to $1, it's a $1 word. You may want to verify that "maximize" and "reciprocal" are $1 words.
Anti-Nines and Addition Magic (10-6 through 10-8)
Posted on October 6th, 2009 by kramer
Anti-nines are pairing numbers that sum to 9 like:
0 and 9,1 and 8, 2 and 7, 3 and 6, 4 and 5, 5 and 4, 6 and 3, 7 and 2, 8 and 1, 9 and 0
Digital Roots Help Check Addition and Multiplication (classes 9-29 thru 10-5)
Posted on October 3rd, 2009 by kramer
The digital root of a number is the number obtained by adding all the digits, then adding the digits of that number, and then continuing until a single-digit number is reached.
Famous Mathematicians: Using Subtraction To Determine How Long They Lived. (classes 9-21 thru 9-25)
Posted on September 26th, 2009 by kramer
Mr. Kramer's favorite ten mathematicans: how long did they live?
Amazing Facts about The Great Wall of China and its Country of Origin (9-14 Thru 9-17)
Posted on September 20th, 2009 by kramer