1.   Which number comes next?

4, 5, 6, ___

    A. 6 B. 7
    C. 5 D. 8
    Hint

  2.   Which number comes next?

8, 7, 6, ___

    A. 7 B. 5
    C. 4 D. 6
    Hint

  3.   I come just after 9.

I am just before 11.

What number am I?

    A. 10 B. 12
    C. 2 D. 8
    Hint

  4.   I am just before 6.

I come just after 4?

What number am I?

    A. 4 B. 3
    C. 5 D. 7
    Hint