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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: 16, 18, ____, 22, 24.
2. Find the missing number in the sequence: 9, 11, ____, 15, 17.
3. Find the missing number in the sequence: 12, 13, ____, 15, 16.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
5. Find the missing number in the sequence: 10, 11, ____, 13, 14.
6. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7. Find the missing number in the sequence: 17, 19, ____, 23, 25.
8. Find the missing number in the sequence: 4, 5, ____, 7, 8.
9. Find the missing number in the sequence: 2, 7, ____, 17, 22.
10. Find the missing number in the sequence: 16, 21, ____, 31, 36.
11. Find the missing number in the sequence: 5, 7, ____, 11, 13.
12. Find the missing number in the sequence: 14, 19, ____, 29, 34.
12 questions · Seed 44 · 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: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
2. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
3. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14The sequence increases by 1 each step: 13 + 1 = 14.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
5. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
6. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
7. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
8. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
9. Find the missing number in the sequence: 2, 7, ____, 17, 22.
12The sequence increases by 5 each step: 7 + 5 = 12.
10. Find the missing number in the sequence: 16, 21, ____, 31, 36.
26The sequence increases by 5 each step: 21 + 5 = 26.
11. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9The sequence increases by 2 each step: 7 + 2 = 9.
12. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
12 questions · Seed 44 · 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: 16, 18, ____, 22, 24.
2. Find the missing number in the sequence: 9, 11, ____, 15, 17.
3. Find the missing number in the sequence: 12, 13, ____, 15, 16.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
5. Find the missing number in the sequence: 10, 11, ____, 13, 14.
6. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7. Find the missing number in the sequence: 17, 19, ____, 23, 25.
8. Find the missing number in the sequence: 4, 5, ____, 7, 8.
9. Find the missing number in the sequence: 2, 7, ____, 17, 22.
10. Find the missing number in the sequence: 16, 21, ____, 31, 36.
11. Find the missing number in the sequence: 5, 7, ____, 11, 13.
12. Find the missing number in the sequence: 14, 19, ____, 29, 34.
12 questions · Seed 44 · 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: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
2. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
3. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14The sequence increases by 1 each step: 13 + 1 = 14.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
5. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
6. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
7. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
8. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
9. Find the missing number in the sequence: 2, 7, ____, 17, 22.
12The sequence increases by 5 each step: 7 + 5 = 12.
10. Find the missing number in the sequence: 16, 21, ____, 31, 36.
26The sequence increases by 5 each step: 21 + 5 = 26.
11. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9The sequence increases by 2 each step: 7 + 2 = 9.
12. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
12 questions · Seed 44 · Age guidance, not curriculum certification