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How many rectangles (including squares) can be traced along the lines of the grid shown?

Competition practicePermutations & Combinations
  • A20
  • B72
  • C60
  • D12

Step-by-Step Solution

A rectangle needs 2 of the 5 vertical lines and 2 of the 4 horizontal lines: . (12 counts only the small squares.)
Answer: C) 60

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