A pattern is made using matchsticks. What is the number of matchsticks needed to create the next member in the pattern?

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Solution

The correct option is B 21
Number of sticks used for the first member = 6
Number of sticks used for the second member = 6 + 5 = 11

Number of sticks used for the third member = 6 + 5 + 5 = 16
Therefore, number of sticks required for the fourth member = 16 + 5 = 21

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