how many cubes are needed to build a staircase with 50 steps? 100 steps and n steps?

Question

How amny tiles are needed to make a staircase with 50 steps? 100 steps? n steps?

Answer 1

staers...step 1=1 kube

step 2=2 kubes

step 3=3 kubes

This is simpel "arithmatik sequens"

so simpel its oft kalled "triangel numbers"

sum=n*(n+1)/2

for n=50, sum=1,275

n=100, sum=5,050