Skip Counting — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. What is the missing number? 20, 25, ___, 35, 40.
A) 28
B) 32
C) 30
D) 33
This sequence counts by 5s. The missing number between 25 and 35 is 25 + 5 = 30.
2. Which sequence shows counting by 5s correctly?
A) 5, 10, 20, 25, 30
B) 5, 10, 15, 20, 25
C) 5, 15, 20, 30, 35
D) 10, 15, 25, 30, 40
In a correct count-by-5s sequence, each number is exactly 5 more than the previous one. 5, 10, 15, 20, 25 follows this pattern perfectly.
3. What number comes next? 110, 120, 130, 140, ___.
A) 145
B) 150
C) 155
D) 160
This sequence counts by 10s. The next number after 140 is 140 + 10 = 150.
4. Which number is missing? 12, 14, ___, 18, 20.
A) 13
B) 15
C) 16
D) 17
This sequence counts by 2s. The missing number between 14 and 18 is 14 + 2 = 16.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Count by 5s: 55, 60, 65, 70, 75.
Counting by 5s, the missing number between 65 and 75 is 65 + 5 = 70.
2. Count by 2s: 18, 20, 22, 24, 26.
Counting by 2s, the missing number between 20 and 24 is 20 + 2 = 22.
3. Count by 10s: 160, 170, 180, 190.
Counting by 10s, the next number after 180 is 180 + 10 = 190.
4. Count by 5s: 80, 85, 90, 95, 100.
Counting by 5s, the missing number between 85 and 95 is 85 + 5 = 90.
5. Count by 2s: 6, 8, 10, 12, 14.
Counting by 2s, the missing number before 8 is 8 - 2 = 6.