Question 890394
{{{(N-5)4+(N-4)4+(N-3)4+(N-2)4+(N-1)4+(N)4+(N+1)4+(N+2)4+(N+3)4+(N+4)4=140}}}
{{{4(N-5+N-4+N-3+N-2+N-1+N+N+1+N+2+N+3+N+4)=140}}}
{{{4(10N-5)=140}}}
{{{40N-20=140}}}
{{{40N=160}}}
{{{N=4}}}
The largest is 
{{{(N+4)4=(4+4)4=8*4=32}}}