If $$A=\{x: x$$ is a multiple of 8$$\}$$ and $$B=\{x: x$$ is a multiple of 12$$\}$$, then $$A \cap B$$ consists of multiple of

If A = {x : x is a multiple of 4} and B = {x : x is a multiple of 6}, then A $$\cap$$ B consists of multiples of

Which of the following is not an equivalence relation in z?

If $$A = \{ x:{x^2} = 1\} $$ and $$B = \{ x:{x^4} = 1\} $$, then A $$\Delta$$ B is equal to