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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: 4, 5, ____, 7, 8.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
3. Find the missing number in the sequence: 14, 19, ____, 29, 34.
4. Find the missing number in the sequence: 17, 18, ____, 20, 21.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
8. Find the missing number in the sequence: 8, 13, ____, 23, 28.
9. Find the missing number in the sequence: 5, 6, ____, 8, 9.
10. Find the missing number in the sequence: 18, 23, ____, 33, 38.
11. Find the missing number in the sequence: 18, 20, ____, 24, 26.
12. Find the missing number in the sequence: 10, 15, ____, 25, 30.
12 questions · Seed 62 · 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: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
3. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
4. Find the missing number in the sequence: 17, 18, ____, 20, 21.
19The sequence increases by 1 each step: 18 + 1 = 19.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22The sequence increases by 1 each step: 21 + 1 = 22.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
14The sequence increases by 2 each step: 12 + 2 = 14.
8. Find the missing number in the sequence: 8, 13, ____, 23, 28.
18The sequence increases by 5 each step: 13 + 5 = 18.
9. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
10. Find the missing number in the sequence: 18, 23, ____, 33, 38.
28The sequence increases by 5 each step: 23 + 5 = 28.
11. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
12. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
12 questions · Seed 62 · 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: 4, 5, ____, 7, 8.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
3. Find the missing number in the sequence: 14, 19, ____, 29, 34.
4. Find the missing number in the sequence: 17, 18, ____, 20, 21.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
8. Find the missing number in the sequence: 8, 13, ____, 23, 28.
9. Find the missing number in the sequence: 5, 6, ____, 8, 9.
10. Find the missing number in the sequence: 18, 23, ____, 33, 38.
11. Find the missing number in the sequence: 18, 20, ____, 24, 26.
12. Find the missing number in the sequence: 10, 15, ____, 25, 30.
12 questions · Seed 62 · 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: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
3. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
4. Find the missing number in the sequence: 17, 18, ____, 20, 21.
19The sequence increases by 1 each step: 18 + 1 = 19.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22The sequence increases by 1 each step: 21 + 1 = 22.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
14The sequence increases by 2 each step: 12 + 2 = 14.
8. Find the missing number in the sequence: 8, 13, ____, 23, 28.
18The sequence increases by 5 each step: 13 + 5 = 18.
9. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
10. Find the missing number in the sequence: 18, 23, ____, 33, 38.
28The sequence increases by 5 each step: 23 + 5 = 28.
11. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
12. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
12 questions · Seed 62 · Age guidance, not curriculum certification