Is 500 one of the multiples of 3?

Answer 1

No.

To be divisible by 3, if the sum of the digits is divisible by 3 so is the original number, otherwise the remainder when the sum is divided by 3 is the remainder when the original number is divided by 3.

5 + 0 + 0 = 5

5 ÷ 3 = 1 r 2, so 500 ÷ 3 has remainder 2.