The characteristics of numbers divisible by 4 is that their last two digits form a number divisible by 4
so the two digit numbers which are multiples of 4 from set f are 12,24 and 32
since there are always two remaining numbers there are 2x3=6. 6 4-digit positive numbers possible to be divisible by 4
the numbers are 3412, 4312, 1324, 3124, 1432, 4132
