isisalaska wrote:Hi
Even though I have read the explanation the OG and Kaplan give regarding Property of Numbers I am till having difficulties getting the problems right. I tried the strategy of plugging numbers and, although sometimes works, it takes me a long time. Does anyone have a better strategy? Or can anyone refer me a another source?

Thanks!

isisalaska I think regarding your question, I think the more you solve the problem the more u get tools to solve the problem. If any one give you the sum of all the tips and techniques regarding property of numbers then also it would not help, if you don't practice.
Just go on solving the problems and note the points where u faced the problem.. Apart from this note the points where u get sth new.
well plug in numbers always comes handy in solving problems, but not in all problems...