(A) A number is divisible by 4, if the last two digits of the number are divisible by 4.
In 412, the last two digits 12 are divisible by 4, that is, (12 ÷ 4 = 3), so 412 is divisible by 4.
(B) A number is divisible by 8, if the last three digits of the number are divisible by 8.
In 4808, the last three digits, 808 are divisible by 8, that is, (808 ÷ 8 = 101), so 4808 is divisible by 8.