楼主。 75题, 54=2*3*3*3, choice should be A since (i) 2+3+3+3=11, n=4。 but (II) is wrong, if 54=1*2*3*3*3, then n=5.
number 78, if a1=5, a2=4, a3=3, a2=2, a1=1, then a1+1, a2+2, a3+3, a4+4, a5+5 have the same reminder after they divided by 5, the answer should be II only.