A clock gains 4 minutes every hour. If it was set correctly 6 hours ago, how far from the correct time is it now?

Correct answer: Option B — 24 minutes fast. Total gain = rate × elapsed time = 4 × 6 = 24 minutes. Option A (24 minutes slow) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error. Option C (20 minutes fast) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error. Option D (28 minutes fast) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error.