D = x E = x is a perfect square between 1 and 9 F = x is an even number greater than or equal to 2 and less than 9 Which of the following is D ∩ F?

Question

D = x is a whole number

E = x is a perfect square between 1 and 9
F = x
Which of the following is D ∩ F?

Answer 1

D = x
E = {4}
F = {2, 4, 6, 8}

D ∩ F = {2, 4, 6, 8}