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Browse Middle School Factoring Numbers
Stars indicate particularly interesting answers or
good places to begin browsing.
Working with variables? Try Middle School Factoring Expressions.
Selected answers to common questions:
Finding a least common denominator (LCD).
LCM, GCF.
Prime factoring.
Table of factors 160.
 Product of Numbers 1100 [02/23/2002]

I was wondering how to find out how many zeros will be at the end of the
product of all the numbers from 1 to 100 without multiplying them all
out.
 ProductPerfect Numbers [02/26/2001]

Is there a statement that describes productperfect numbers?
 Products of Digits [03/02/2003]

The product of digits in the number 234 is 24: 2*3*4 = 24. Can you
describe a general procedure for figuring out how many xdigit numbers
have a product equal to p, where x and p are counting numbers? How
many different threedigit numbers have a product equal to 12? to
18? Why?
 Rectangles and Factors [09/09/1998]

How many rectangles can you make with 10 small squares? 5 small squares?
12 small squares?
 Rectangular Solids from Blocks [09/25/1998]

How many rectangular solids can be made from "n" cubeshaped blocks?
 Reducing Fractions [7/4/1996]

How do you reduce fractions with different denominators?
 Relatively Prime [10/07/1999]

What does the term relatively prime mean, and how can you determine if
two numbers are relative primes?
 The Sieve, and Ceiling, of Eratosthenes [07/27/2012]

Before introducing children to the sieve of Eratosthenes, a parent seeks to reconcile
different methods found online. Doctor Peterson sees a didactic opportunity in the
discrepant steps: how many factors do you actually need to check?
 Simplifying Fractions [12/08/2002]

Finding and eliminating (cancelling) prime factors.
 Simplifying Fractions by Factorizing [05/22/1998]

Using factor trees to prime factor and simplify 188/240.
 The Smallest Number Which When Divided Leaves Specific Remainders [02/27/2010]

Doctor Rick, an eleven yearold, and her father apply least common multiples,
modular arithmetic, and the Chinese Remainder Theorem to reason their way to the
smallest number which when divided by 3, 7, and 11 leaves remainders 1, 6, and 5,
respectively.
 Table of Factors 160 [10/23/2001]

Where can I find a factor sheet with the factors 1  100?
 Thinking about Number Pattern Problems [08/09/2004]

How do I figure out the next 2 numbers in the pattern 1, 8, 27, 64,
____, ____?
 Tips for Simplifying Fractions [06/03/1998]

Can you give my some tips to help me simplify fractions?
 Two Mathematicians: Factoring Logic [03/24/2003]

Two mathematicians are each assigned a positive integer. They are told
that the product of the two numbers is either 8 or 16. Neither knows
the other's number...
 Unknown Numbers and a Venn Diagram [11/26/2001]

The GCF of two numbers is 20 and the LCM is 840. One of the numbers is
120. Explain how to find the other number and use the Venn diagram method
to illustrate.
 Using Euclid's Algorithm with Three Numbers [11/05/2003]

How do I find the GCD of three integers using Euclid's Algorithm? I
am not sure where you plug the third integer into the algorithm.
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