Question

Which of the following two sets are disjoint?

(a) {1, 3, 5} and {1, 3, 6}

(b) {1, 2, 3} and {1, 2, 3}

(c) {1, 3, 5} and {2, 3, 4}

(d) {1, 3, 5} and {2, 4, 6}

The question was posed to me in an interview for internship.

This intriguing question comes from Set Operations in division Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer 1

Correct answer is (d) {1, 3, 5} and {2, 4, 6}

To elaborate: Two sets are disjoint if the intersection of two sets is the empty set.