Preference

Question: If m and n are positive integers, which of the following must be an even integer?

  1. a.
    n(m - 1)
  2. b.
    (n - 1)m
  3. c.
    (m - 1)(n - 2)
  4. d.
    n(n - 1)(m - 1)
  5. e.
    None of these
Answer: d
comments powered by Disqus

Share our page