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GATE 2017 CE (CE2) – Question 10

General Aptitude · Quantitative Aptitude: Arithmetic and Number Computation · 2 marks · Multiple choice

Each point on the graph denotes a lift halt lasting 1 minute during a one-hour period. Consider: (i) The lift never moves directly from one non-ground floor to another non-ground floor. (ii) It stays on the fourth floor for the longest duration. Which statements are correct?

Diagram for GATE 2017 CE (CE2) question 10
  1. Only i
  2. Only ii
  3. Both i and ii
  4. Neither i nor ii

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Show answer and explanation

Correct answer: (D) Neither i nor ii

Explanation

Statement i is false: the lift goes from floor 5 near minute 33 to floor 4 near minute 35 without a ground-floor halt between them. Each plotted point is a one-minute halt; the ground floor has more points than floor 4, so ii is also false. Answer D.