Find the total number of match sticks required to make n such letters as shown.
5n
(a) From the figure, it can be observed that it we require two matchsticks to make T. Therefore, we need 2n matchsticks for n such letters.
(b) Similarly, we require three matchsticks to make Z. Therefore we need 3n matchsticks for n such letters.
So, together we need 2n+3n = 5n matchsticks to make
n Z's and T's.