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The number of rectangles that you can find on a chess board is

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The number of rectangles that you can find on a chess board is
1. 144
2. 1296
3. 256
4. None of these
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Correct Answer - Option 2 : 1296

Concept:

Number of horizontal lines in chess board = 9

Number of vertical lines in chess board = 9

Calculation:

2 horizontal lines and 2 vertical lines will for 1 rectangle box

Number of rectangle = 9C2 × 9C2 

⇒ 36 × 36 = 1296

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