Home Competitions AMC 10 2021-fall-b Problem 12
AMC 10 2021-fall-b Problem 12
Which of the following conditions is sufficient to guarantee that integers x x x , y y y , and z z z satisfy the equation
x ( x − y ) + y ( y − z ) + z ( z − x ) = 1 ? x(x-y)+y(y-z)+z(z-x) = 1? x ( x − y ) + y ( y − z ) + z ( z − x ) = 1 ?
(A) x > y \textbf{(A)} \: x>y (A) x > y and y = z y=z y = z
(B) x = y − 1 \textbf{(B)} \: x=y-1 (B) x = y − 1 and y = z − 1 y=z-1 y = z − 1
(C) x = z + 1 \textbf{(C)} \: x=z+1 (C) x = z + 1 and y = x + 1 y=x+1 y = x + 1
(D) x = z \textbf{(D)} \: x=z (D) x = z and y − 1 = x y-1=x y − 1 = x
(E) x + y + z = 1 \textbf{(E)} \: x+y+z=1 (E) x + y + z = 1
Dataset text NuminaMath-1.5 . Quoted with source.
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