Number Lines — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. What number fills the blank: 30, 40, 50, ___, 70?
A) 55
B) 60
C) 65
D) 80
The pattern jumps by 10 each time, so after 50 comes 60 on the number line.
2. What number fills the blank: 15, 20, 25, ___, 35?
A) 28
B) 32
C) 30
D) 33
The pattern jumps by 5 each time, so after 25 the next tick is 30.
3. What number fills the blank: 200, 300, ___, 500, 600?
A) 350
B) 400
C) 450
D) 420
The pattern jumps by 100 each step, so between 300 and 500 the tick is 400.
4. What number fills the blank: 45, 55, ___, 75, 85?
A) 65
B) 60
C) 70
D) 80
The pattern jumps by 10, so after 55 the next number is 65 on the line.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Fill in the missing number: 10, 20, 30, 40, 50.
The pattern jumps by 10, so the tick between 20 and 40 is 30 on the number line.
2. Fill in the missing number: 5, 10, 15, 20, 25.
The pattern jumps by 5 each time, so after 20 the next tick is 25.
3. Fill in the missing number: 100, 200, 300, 400, 500.
The pattern jumps by 100, so the tick between 300 and 500 is 400.
4. Fill in the missing number: 60, 70, 80, 90, 100.
The pattern jumps by 10, so the tick between 80 and 100 is 90 on the line.
5. Fill in the missing number: 35, 40, 45, 50, 55.
The pattern jumps by 5, so the tick between 40 and 50 is 45 on the number line.