Question

plz solve it ..................,

Answer 1

if any number end with the digit 0 or 5 then it should me multiple of 0 or 5
if 3 power n where n=1,2,3 etc it only ends with 3,9,1
if 4 power m where m=1,2,3 etc it only ends with 4,6
if u multiply the ending number of 3 like 3,9,1 with the ending number of 4 like 4,6 it does not  give the number which end with the digit 0 or 5