UPSC PYQPrelims 2026

Civil Services Examination · Question 29

Three variables x, y and z take values 2, 3, 4 or 5 such that their values are always distinct. If M and N denote the largest possible value and the smallest possible value, respectively, of the expression {(x × y) + z}, then M - N is

  1. 11
  2. 12
  3. 13
  4. 14
Show answer & explanation

Answer: (C) 13

Explanation

Maximum = 5×4 + 3 = 23; minimum = 2×3 + 4 = 10. M - N = 13.