[email protected] wrote:Anyone have suggestions for practicing / tackling these? These questions seem to be one of my weaker points...
Thanks in advance,
Eric
hi -
one thing that just about ALL factor / multiple problems on the gmat have in common is that they deal with PRIME FACTORIZATIONS.
therefore, if you see any problem about factors, multiples, and the like, you should try your best to recast the problem in terms of primes and prime factorizations, even if the original problem statement doesn't mention primes at all.
there is a staggering variety of factor/multiple problems out there, so it's difficult for me to give much more specific advice without seeing particular problems. nevertheless:
* if x is divisible by y, then ALL the prime factors of y, including the ones that appear more than once (if there are any), are also factors of x.
* if x is a factor of y, or y is a multiple of x, that's the same as 'x is divisible by y'.
this is only a start; if you have more specific questions, feel free to post them.
good luck.
Ron has been teaching various standardized tests for 20 years.
--
Pueden hacerle preguntas a Ron en castellano
Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi
--
Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.
Yves Saint-Laurent
--
Learn more about ron
