Maths Challenge
Maths challenge.net: Blonde Hair Brown Eyes
A problem involving fractions to determine the fraction of people in a class that have brown eyes.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Ratios and Rates 2
Sixteen problems present a variety of practice simplifying ratios and writing ratios as unit rates. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...