Given below is a pattern made using matchsticks. Observe the given triangular pattern pattern and tell the number of matchsticks used in the next figure in the sequence.
A
13
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B
11
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C
9
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D
7
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Solution
The correct option is B 11
The number of matchsticks used in first figure = 3 The number of matchsticks used in second figure = 5 The number of matchsticks used in third figure = 7 The number of matchsticks used in fourth figure = 9
We can observe that number of matchsticks used in the next figure is always two more than the previous figure. Therefore, the number of matchsticks used in the next figure in given sequence will be 11.