Nikita is going to bake a triple layer cake for her friends birthday. She uses a square pan that is 7 inches by 7 inches for each layer. What is the perimeter of the cake in inches?

28 inchs

Step-by-step explanation: if it is y by 7 and your looking for the peremeter then you simply ignore that its a triple layes and do 7 times 4 which is 28 for the peremeter because a square has 4 equal sides hope this helps

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18