Question

What is the rule that gives the number of matchsticks required in terms of number of ?

Answer 1

We can identify from the question that:

Requires number of matchsticks = $3\times 1=3$ matchsticks

Requires number of matchsticks = $3\times 2=6$ matchsticks

Requires number of matchsticks = $3\times 3=9$

Let us represent the number of by the letter $\text{'}n\text{'}$

Thus, the general rule for the number of matchsticks required for $n$ number of = $3\times n$.