Question

there are 240 bricks used ro build a wall that is 20 feet high. how many bricks will be used for a 1 foot high wall

Answer 1

This problem could be solve with the Simple of Three Rule:

$\begin{gathered} 20\text{ f}eet\to240\text{ bricks} \\ 1\text{foot }\to x\text{ bricks} \\ x=1foot\cdot\frac{240\text{ bricks}}{20\text{ f}eet}=\frac{240}{20}bricks=12\text{ bricks} \end{gathered}$

You need 12 bricks for a 1 foot high wall