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EEJ MAIN Aptitude QUESTION #10973
Question 1
Looking at the figure series: a triangle with 3 lines inside, a square with 4 lines, a pentagon with 5 lines... The total number of lines (interior + boundary sides) in the figure with 7 sides (heptagon) would be:
  • 14✔️
  • 21
  • 7
  • 49
Correct Answer Explanation

Pattern: The figure with \(n\ sides has \(n\ boundary lines + \(n\ internal lines = \(2n\ total lines.

For \(n = 7\: Total = \(2 \times 7 = 14\

Verification: Triangle (n=3): 3 sides + 3 internal lines = 6 total. Square (n=4): 4+4 = 8. Pentagon (n=5): 5+5 = 10. Heptagon (n=7): 7+7 = 14 ✓