A pattern starts with 11 matchsticks and adds 3 matchsticks for each new figure. Which expression gives the matchsticks...

Type: MCQ • Marks: 1

A pattern starts with 11 matchsticks and adds 3 matchsticks for each new figure. Which expression gives the matchsticks in the nth figure?

A. 11 × 3

B. 3n − 11

C. 11 + 3n

D. 11 + 3(n − 1)

Explanation

For figure 1 there are 11 sticks; each extra figure adds 3. So for the nth figure: 11 + 3(n − 1).

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Class 7th Ganita Prakash 1

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