Hi Ancobaca, and good luck with your return to school and to mathematics.
The number 0 is considered to be divisible by any number. In particular, 4×0 = 0, so 0 is a multiple of 4 and thus 0 is divisible by 4. Any number ending in 00 is a multiple of 4. Also, the last two digits give you the number 0, and that agrees with the rule that if a number is a multiple of 4 then its last two digits form a multiple of 4.