Arpita used 4 matchsticks to make a square. Then she took 3 more sticks and arranged them to make 2

Question

Number of squares
Number of sticks	4	7	10

Arpita used 4 matchsticks to make a square. Then she took 3 more sticks and arranged them to make 2 squares. Another 3 sticks helped her to make 3 squares. How many sticks are needed to make 7 such squares in the same way? How many sticks are needed to make 50 squares?

Answer 1

Matchsticks needed to make 7 squares = 4 + (6 × 3) 

= 22 

Matchsticks needed to make 50 squares= 4 + (49 × 3) 

= 151