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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: 17, 22, ____, 32, 37.
2. Find the missing number in the sequence: 10, 11, ____, 13, 14.
3. Find the missing number in the sequence: 14, 16, ____, 20, 22.
4. Find the missing number in the sequence: 9, 11, ____, 15, 17.
5. Find the missing number in the sequence: 1, 3, ____, 7, 9.
6. Find the missing number in the sequence: 10, 15, ____, 25, 30.
7. Find the missing number in the sequence: 14, 19, ____, 29, 34.
8. Find the missing number in the sequence: 11, 16, ____, 26, 31.
9. Find the missing number in the sequence: 15, 16, ____, 18, 19.
10. Find the missing number in the sequence: 6, 11, ____, 21, 26.
11. Find the missing number in the sequence: 8, 13, ____, 23, 28.
12. Find the missing number in the sequence: 20, 21, ____, 23, 24.
12 questions · Seed 43 · 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: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
2. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
3. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18The sequence increases by 2 each step: 16 + 2 = 18.
4. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
5. Find the missing number in the sequence: 1, 3, ____, 7, 9.
5The sequence increases by 2 each step: 3 + 2 = 5.
6. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
7. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
8. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
9. Find the missing number in the sequence: 15, 16, ____, 18, 19.
17The sequence increases by 1 each step: 16 + 1 = 17.
10. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16The sequence increases by 5 each step: 11 + 5 = 16.
11. Find the missing number in the sequence: 8, 13, ____, 23, 28.
18The sequence increases by 5 each step: 13 + 5 = 18.
12. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22The sequence increases by 1 each step: 21 + 1 = 22.
12 questions · Seed 43 · 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: 17, 22, ____, 32, 37.
2. Find the missing number in the sequence: 10, 11, ____, 13, 14.
3. Find the missing number in the sequence: 14, 16, ____, 20, 22.
4. Find the missing number in the sequence: 9, 11, ____, 15, 17.
5. Find the missing number in the sequence: 1, 3, ____, 7, 9.
6. Find the missing number in the sequence: 10, 15, ____, 25, 30.
7. Find the missing number in the sequence: 14, 19, ____, 29, 34.
8. Find the missing number in the sequence: 11, 16, ____, 26, 31.
9. Find the missing number in the sequence: 15, 16, ____, 18, 19.
10. Find the missing number in the sequence: 6, 11, ____, 21, 26.
11. Find the missing number in the sequence: 8, 13, ____, 23, 28.
12. Find the missing number in the sequence: 20, 21, ____, 23, 24.
12 questions · Seed 43 · 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: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
2. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
3. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18The sequence increases by 2 each step: 16 + 2 = 18.
4. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
5. Find the missing number in the sequence: 1, 3, ____, 7, 9.
5The sequence increases by 2 each step: 3 + 2 = 5.
6. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
7. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
8. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
9. Find the missing number in the sequence: 15, 16, ____, 18, 19.
17The sequence increases by 1 each step: 16 + 1 = 17.
10. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16The sequence increases by 5 each step: 11 + 5 = 16.
11. Find the missing number in the sequence: 8, 13, ____, 23, 28.
18The sequence increases by 5 each step: 13 + 5 = 18.
12. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22The sequence increases by 1 each step: 21 + 1 = 22.
12 questions · Seed 43 · Age guidance, not curriculum certification