Zach is 4 years older than twice his sister maya’s age. let m represent maya’s age.
which expression represents zach’s age?
a.2m
b. m + 4
c.2m + 4
d.4m + 2

(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

answer: a.   one is a factor of every whole number since every number is divisible by itself.