1.   Complete the number sentence.

3 + 3 + 3 + ∅ + 3 = 15
    A. 12 B. 5
    C. 15 D. 3
    Hint
  2.   The number pattern below is formed by skip counting. Find the missing numbers in the pattern.

20, 25, ∅, 35, 40, ∅, 50

    A. 20, 35 B. 28, 42
    C. 30, 45 D. 30, 60
    Hint
  3.   The number pattern below is formed by skip counting. Find the missing numbers in the pattern.

∅, 15, 17, 19, ∅, 23, 25

    A. 13, 21 B. 10, 20
    C. 9, 21 D. 12, 22
    Hint
  4.   The number pattern below is formed by skip counting. Find the missing numbers in the pattern.

5, 9, 13, 17, ∅, ∅, 29, 33
    A. 21, 26 B. 21, 25
    C. 18, 19 D. 20, 25
    Hint
  5.   This number pattern involves skip counting. Describe the pattern. 7, 11, 15, 19, 23, 27
    A. Add 4. B. Subtract 4.
    C. Add 1. D. Add 5.
    Hint