1.   How do you know that 4,689 is divisible by 9?
    A. The product of the digits is divisible by 9. B. The sum of the digits is divisible by 3.
    C. The ones digit is 9. D. The sum of the digits is divisible by 9.
    Hint

  2.   Which number is divisible by 10?
    A. 415 B. 305
    C. 2,005 D. 1,130
    Hint

  3.   In which pair is the first number divisible by the second number?
    A. 419; 9 B. 164; 6
    C. 391; 3 D. 700; 2
    Hint

  4.   A number is divisible by 5 if ______________.
    A. the ones digit is 5. B. the sum of the digits is 5.
    C. the ones digit is 0 or 5. D. the ones digit is 0.
    Hint

  5.   In which pair is the first number divisible by the second number?
    A. 57; 2 B. 405; 10
    C. 234; 3 D. 419; 9
    Hint