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GATE 2016 CS (CS2) – Question 9

General Aptitude · Spatial Aptitude: Spatial Reasoning and Visualization · 2 marks · Multiple choice

Each cell in the shown 2 × 4 rectangular grid is a rectangle. How many rectangles are present?

Diagram for GATE 2016 CS (CS2) question 9
  1. 21
  2. 27
  3. 30
  4. 36

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Show answer and explanation

Correct answer: (C) 30

Explanation

Choose two of three horizontal boundary lines and two of five vertical boundary lines. Each choice uniquely defines a rectangle, giving $\binom32\binom52=3(10)=30$, C.

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