I'm a high school junior, I have to take my TAKS tests in 2 weeks!:( if you don't know what TAKS is, it is an exit exam to determine if you graduate or not. I have sucked at math my whole life, and the math test will be difficult for me! and science, Well, I'm afraid of that test too!:( do any of you have a testing strategy for me? Help me please? I really need help!

When you're looking for the Common Denominator just take away the LAST digit of the first number and the FIRST digit of the last number.
Observe-
16/64
Take away the 6 (in 16) and the 6 (in 64) gives us --> 1/4.
Bam! A much easier way to find the Common Denominator.
My apologies. Why are you assuming I'm a Troll though? We all make mistakes.
It's always difficult to discern intent through the Internet so more often than not new ways of thinking are seen as Trolling. It's a comon error. But I guess to be human is to hold assumptions.
I don't know how they expect people to remember all that math. They're herbal supplements you can take for boosting your memory, but would that be considered cheating?