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Question
Colour a rectangle made of 20 boxes in some other way.
Solution
Rectangles made of 20 boxes in different ways are shown below:
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| Number of bangles | Different groups we can make |
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| 24 | 1, 2, .................... |
| 5 | |
| 9 | |
| 7 | |
| 2 | |
| 10 | |
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| 20 | |
| 13 | |
| 21 |
