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Missing sequence terms
Use the constant step size between terms to find the missing middle number in a sequence. Review suitability for your learners before teaching.
Worksheet StudioPractice pack · Ages 4-6
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 19, 21, ____, 25, 27.
2. Find the missing number in the sequence: 8, 9, ____, 11, 12.
3. Find the missing number in the sequence: 4, 5, ____, 7, 8.
4. Find the missing number in the sequence: 12, 17, ____, 27, 32.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
6. Find the missing number in the sequence: 16, 17, ____, 19, 20.
7. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8. Find the missing number in the sequence: 5, 10, ____, 20, 25.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
10. Find the missing number in the sequence: 8, 10, ____, 14, 16.
11. Find the missing number in the sequence: 18, 19, ____, 21, 22.
12. Find the missing number in the sequence: 13, 18, ____, 28, 33.
12 questions · Seed 104732 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 4-6
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
2. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10The sequence increases by 1 each step: 9 + 1 = 10.
3. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
4. Find the missing number in the sequence: 12, 17, ____, 27, 32.
22The sequence increases by 5 each step: 17 + 5 = 22.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
14The sequence increases by 5 each step: 9 + 5 = 14.
6. Find the missing number in the sequence: 16, 17, ____, 19, 20.
18The sequence increases by 1 each step: 17 + 1 = 18.
7. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
8. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
10. Find the missing number in the sequence: 8, 10, ____, 14, 16.
12The sequence increases by 2 each step: 10 + 2 = 12.
11. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20The sequence increases by 1 each step: 19 + 1 = 20.
12. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
12 questions · Seed 104732 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 4-6
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 19, 21, ____, 25, 27.
2. Find the missing number in the sequence: 8, 9, ____, 11, 12.
3. Find the missing number in the sequence: 4, 5, ____, 7, 8.
4. Find the missing number in the sequence: 12, 17, ____, 27, 32.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
6. Find the missing number in the sequence: 16, 17, ____, 19, 20.
7. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8. Find the missing number in the sequence: 5, 10, ____, 20, 25.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
10. Find the missing number in the sequence: 8, 10, ____, 14, 16.
11. Find the missing number in the sequence: 18, 19, ____, 21, 22.
12. Find the missing number in the sequence: 13, 18, ____, 28, 33.
12 questions · Seed 104732 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 4-6
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
2. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10The sequence increases by 1 each step: 9 + 1 = 10.
3. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
4. Find the missing number in the sequence: 12, 17, ____, 27, 32.
22The sequence increases by 5 each step: 17 + 5 = 22.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
14The sequence increases by 5 each step: 9 + 5 = 14.
6. Find the missing number in the sequence: 16, 17, ____, 19, 20.
18The sequence increases by 1 each step: 17 + 1 = 18.
7. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
8. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
10. Find the missing number in the sequence: 8, 10, ____, 14, 16.
12The sequence increases by 2 each step: 10 + 2 = 12.
11. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20The sequence increases by 1 each step: 19 + 1 = 20.
12. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
12 questions · Seed 104732 · Age guidance, not curriculum certification