If \(f:\{1,2,3,4\}\to\{0,1\}\) is defined by \(f(x)=0\) when \(x\) is even and \(f(x)=1\) when \(x\) is odd, what is the value of \(f(3)\)?

Correct answer: 1

The number 3 is odd. According to the given rule, \(f(x)=1\) for every odd \(x\); therefore, \(f(3)=1\). The value 0 applies only when the input is even. In an exam, first check whether the input is even or odd, and then apply the definition.