A sum-product number is a number n such that the sum of n ... Obviously, such a number must be divisible by its digits as well as the sum of its digits. ...
mathworld.wolfram.com/Sum-ProductNumber.html mathworld.wolfram.com/Sum-ProductNumber.html
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1. Vocabulary: number, sum, total, solve Review words as needed. Return to this page. Review the idea of "A Number" as needed. Return to this page. ... how you arrived at each other number when the sum of two numbers is 12. If you used subtraction, part 3 will explain ... 1st number 2nd number sum Because:
www.mathnstuff.com/math/algebra/otherno.htm
Sum-product number - Wikipedia, the free encyclopedia
A sum-product number is an integer that in a given base is equal to the sum of its digits times the product of its digits. Or, to put it algebraically, given an integer n that is l digits long i...
en.wikipedia.org/wiki/Sum-product_number
Perfect number - Wikipedia, the free encyclopedia
In mathematics, a perfect number is defined as a positive integer which is the sum of its proper positive divisors, that is, the sum of the positive divisors excluding the number itself. Equivalentl...
en.wikipedia.org/wiki/Perfect_number
Sum means you add the numbers together.
http://www.blurtit.com/q5055359.html
Animated, interactive math dictionary with definitions of over 600 common math terms in simple language. Math glossary, examples, practice interactives, calculators and mathematical activities for kids. © Jenny Eather 2001-2009 ... - definitions, examples, activities, ... FLASH PLAYER 6 or later required - download here...
www.amathsdictionaryforkids.com/
Hi Adam, Instead of the problem Dr. Steven talked about, could you have been asking a different question, like "what is the sum of the DIGITS of 1 + 2 + 3 +...+ 100?" If so, the last thing we want to do is look at every number between 1 and a hundred and add all their digits.
mathforum.org/dr.math/problems/cooper.3.29.97.html
A sum-product number is a number such that the sum of 's digits times the product of 's digit is itself, for example ... The only sum-product numbers less than...
www.math.sdu.edu.cn/mathency/math/s/s848.htm
Replacing Table by Sum adds up the numbers in the list: ... This means ''Sum the numbers as goes from to with a step size of ''. Here's another example, which sums the numbers as goes from to with a step size of :
www.math.pitt.edu/~sparling/23021/mathematica1/node20.h... www.math.pitt.edu/~sparling/23021/mathematica1/node20.html
Addition - Wikipedia, the free encyclopedia
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Addition is the mathematical process of combining quantities. The plus sign "+" means that numbers are added together. For example, in the picture on the right, there are 3 + 2 apples—meaning three a...
en.wikipedia.org/wiki/Addition
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