Quest for Unreachable Sums


For how many values of $m$ , the following equation does not have any solution in positive integers? 

$\frac{x}{y}$+$\frac{y}{z}$+$\frac{z}{t}$+$\frac{t}{x}=m$


Equation  


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Statistics



Attempt 25


Solve 18


First Solve Rimon123