I think the answer is wrong online so I would like to know what the correct answer is before I teach a student!
If it takes 6 cubes to build 3 steps, how many cubes will be needed for 11 steps?
It sounds so easy but my answer doesn't match the answer sheet. Thanks!
For N steps, the number needed is
1 + 2 + ... + N
This sum can always be written
N (N+1)/2
N = 11, the number of blocks needed is
11x12/2 = 66
Thank you so much!
Bruh u is not a teacher
right I have seen her/his post and they all are just questions looking for answers
Btw I am not a teacher my self I just like pixie sticks
To find out how many cubes will be needed for 11 steps, we can first determine the pattern.
Given that it takes 6 cubes to build 3 steps, we can calculate the number of cubes required for each step by dividing the number of cubes by the number of steps. In this case, 6 cubes divided by 3 steps equals 2 cubes per step.
To find the number of cubes required for 11 steps, we can multiply the number of steps by the number of cubes per step. So, 11 steps multiplied by 2 cubes per step equals 22 cubes.
Therefore, the correct answer is 22 cubes will be needed for 11 steps.