1.   Find the missing numbers.

12, ___, 14, ___

    A. 12, 12 B. 13, 16
    C. 13, 15 D. 15, 13
    Hint

  2.   Find the missing number.

3, 2, ___

    A. 2 B. 5
    C. 1 D. 4
    Hint

  3.   Find the missing number.

8, ___, 6

    A. 2 B. 9
    C. 7 D. 14
    Hint

  4.   Find the missing numbers.

4, ___, 6, ___

    A. 5, 6 B. 5, 7
    C. 10, 9 D. 7, 5
    Hint

  5.   Find the missing numbers.

6, ___, 8, ___

    A. 6, 9 B. 7, 9
    C. 8, 9 D. 7, 10
    Hint