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Anil builds a fence using square panels in a row. The first square needs 4 sticks, and each new square added beside it shares one side and needs 3 more sticks.
How many sticks are needed to build a row of 5 joined squares?

Class 6Patterns and RulesAlgebra
  • A15
  • B16
  • C17
  • D20

Step-by-Step Solution

First square: 4 sticks. Each of the next 4 squares adds 3 sticks: . Total = 4 + 12 = 16. (Rule: )
Answer: B) 16

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