Match the following figures according to the number of matchsticks required to make them.

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Solution

The number of matchsticks used in the above pattern is 3, 5, and 7.

The number of matchsticks used can also be represented as

Hence, it is clear that the above pattern follows 2n+1.

Similarly, the other patterns follow,

Hence the answer is 1-c; 2-a; 3-d

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