Exchanging coins

#1

i still dont understand about :
if(n < 12) return n;
what about numbers like 17 etc they are not divisible by 2 , 3 , 4
will they return 17 or solvethproblem(8 (17/2) , 5(17/5) , 4(17/4))

#2

@Sharma-Ji-2113935035584586,
n=17 will return
solvethproblem(8 (17/2) , 5(17/5) , 4(17/4))