Suppose we use matchsticks to make letter F
Here, we used 4 matchsticks
Suppose, we want to Make more than one Fs.
So,
2 Fs require 8 matchsticks
3 Fs require 12 matchsticks
4 Fs require 16 matchsticks
and so on……
So,
we can say that
Number of matchsticks = 4 × Number of Fs
Writing n = number of Fs
Number of matchsticks = 4n
Let’s check
For n = 1, Number of matchsticks = 4 × 1 = 4
For n = 2, Number of matchsticks = 4 × 2 = 8
For n = 3, Number of matchsticks = 4 × 3 = 12
So, writing
Number of matchsticks = 4 n
makes our job easier
Suppose we have to make 100 Fs
Number of matchsticks = 4 × 100
= 400