Question 19
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How many rectangles (including squares) are there on a chessboard?
- A 204
- B 64
- C 784
- D 1,296 Correct
Correct Answer: Option D
9 lines each way; choose 2 of each
9C2 × 9C2 = 36 × 36 = 1,296
Trap: 204 counts only squares.
Answer: 1,296
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