It takes 6 cubes to build a staircase with 3 steps. How many cubes will be needed for 11 steps?

Answer:
66 Cubes would be needed.
Step-by-step explanation:
If you look at the already given example, you could conclude that to get to six you count the steps(3) and add down as (3+2+1=6) Repeat will 11 Cubes and you have (11+10+9+8+7+6+5+4+3+2+1=66)