4 ms·

This was also the infamous amc 2015 "clockblock" question https://artofproblemsolving.com/wiki/index.php/2015_AMC_10A_Problems/Problem_14 https://artofproblems

• CrazyStat 3y ago
  I remember having the same question (probably with different sized circles) in our local high school math team competition ca. 2002. I got it wrong.
  • genocidicbunny 3y ago
    I distinctly recall having to solve a version of this in my 2nd grade math class. Only about half the class got it right.