Question

Cadets are marching in a parade. There are $5$ cadets in each row. What is the rule for the number of cadets, for a given number of rows? Use 'n' for the number of rows.

Answer 1

We know that
No. of cadets in $1$ row$=5$
No. of cadets in $2$ row$=5\times 2=10$
No. of cadets in $3$ row$=5\times 3=15$
So,
No. of cadets $=5\times$no. of rows
Now, taking no. of rows$=n$
Therefore,
No. of cadets$=5\times n=5n$
Where n=no. of rows