website searching problems?

[Sopheak]

I really want to improve my math, so i decided to find some of website that provide a tricky math exercise. Is there recommendation ? I'm still in a high school and I want a tricky one with step by steps answers to check, not a basic one. thank you!!

[Jeff P]

Can't really help you unless you tell us what type of math you need help with. Algebra? Geometry? Trigonometry?

[Hafeez Bukhari]

Here mathematics websites.
http://www.math.com/
http://www.math.gatech.edu/
http://tutorial.math.lamar.edu/