Consider an incomplete pyramid of balls on a square base having 18 layers; and having 13 balls on each side of the top layer. Then the total number N of balls in that pyramid satisfies

Question

Consider an incomplete pyramid of  balls on a square base having 18 layers; and having 13 balls on each side of  the top layer. Then the total number N of balls in that pyramid satisfies

Examsnet · Accepted Answer

Correct Answer is :  8000 < N < 9000

KVPY SA Exam 2011 Question Paper