Apainter bought 14 gallons of paint just to never enough to cover 2 rooms 1 room is twice the size of the other and requires three coats of paint the smaller room only requires two coats then the client decided not to paint the smaller room after all. how many gallons of paint would be left

(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

the answer is d. (1.2, -4.7) on edgn

hope this !