Problem Rankings

Rank Source Description Elo Rating
2081 AMC 12 1996 A Q29 If \(n\) is a positive integer such that \(2n\) ha... 1500.00
2082 AMC 12 1996 A Q30 A hexagon inscribed in a circle has three consecut... 1500.00
2083 AMC 12 1991 A Q4 Which of the following triangles cannot exist? ... 1500.00
2084 AMC 12 1991 A Q5 In the arrow-shaped polygon [see figure], the angl... 1500.00
2085 AMC 12 1991 A Q7 If \(x = \frac{a}{b}\), \(a \ne b\) and \(b \ne 0\... 1500.00
2086 AMC 12 1991 A Q8 Liquid X does not mix with water. Unless obstruct... 1500.00
2087 AMC 12 1991 A Q9 From time \(t = 0\) to time \(t = 1\) a population... 1500.00
2088 AMC 12 1991 A Q10 Point \(P\) is \(9\) units from the center of a ci... 1500.00
2089 AMC 12 1991 A Q11 Jack and Jill run \(10\) kilometers. They start a... 1500.00
2090 AMC 12 1991 A Q12 The measures (in degrees) of the interior angles o... 1500.00
2091 AMC 12 1991 A Q13 Horses X, Y and Z are entered in a three-horse rac... 1500.00
2092 AMC 12 1991 A Q14 If \(x\) is the cube of a positive integer and \(d... 1500.00
2093 AMC 12 1991 A Q15 A circular table has exactly 60 chairs around it. ... 1500.00
2094 AMC 12 1991 A Q16 One hundred students at Century High School partic... 1500.00
2095 AMC 12 1991 A Q17 A positive integer \(N\) is a palindrome if the in... 1500.00
2096 AMC 12 1991 A Q18 If \(S\) is the set of points \(z\) in the complex... 1500.00
2097 AMC 12 1991 A Q19 Triangle \(ABC\) has a right angle at \(C\), \(AC ... 1500.00
2098 AMC 12 1991 A Q20 The sum of all real \(x\) such that \((2^{x} - 4)^... 1500.00
2099 AMC 12 1991 A Q21 If \(f\left(\frac{x}{x - 1}\right) = \frac{1}{x}\)... 1500.00
2100 AMC 12 1991 A Q22 Two circles are externally tangent. Lines \(\over... 1500.00