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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 7-9
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 10, 14, ____, 22, 26.
2. Find the missing number in the sequence: 11, 14, ____, 20, 23.
3. Find the missing number in the sequence: 17, 27, ____, 47, 57.
4. Find the missing number in the sequence: 2, 12, ____, 32, 42.
5. Find the missing number in the sequence: 9, 15, ____, 27, 33.
6. Find the missing number in the sequence: 6, 15, ____, 33, 42.
7. Find the missing number in the sequence: 2, 8, ____, 20, 26.
8. Find the missing number in the sequence: 19, 26, ____, 40, 47.
9. Find the missing number in the sequence: 5, 15, ____, 35, 45.
10. Find the missing number in the sequence: 17, 21, ____, 29, 33.
11. Find the missing number in the sequence: 7, 11, ____, 19, 23.
12. Find the missing number in the sequence: 18, 26, ____, 42, 50.
12 questions · Seed 104737 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 10, 14, ____, 22, 26.
18The sequence increases by 4 each step: 14 + 4 = 18.
2. Find the missing number in the sequence: 11, 14, ____, 20, 23.
17The sequence increases by 3 each step: 14 + 3 = 17.
3. Find the missing number in the sequence: 17, 27, ____, 47, 57.
37The sequence increases by 10 each step: 27 + 10 = 37.
4. Find the missing number in the sequence: 2, 12, ____, 32, 42.
22The sequence increases by 10 each step: 12 + 10 = 22.
5. Find the missing number in the sequence: 9, 15, ____, 27, 33.
21The sequence increases by 6 each step: 15 + 6 = 21.
6. Find the missing number in the sequence: 6, 15, ____, 33, 42.
24The sequence increases by 9 each step: 15 + 9 = 24.
7. Find the missing number in the sequence: 2, 8, ____, 20, 26.
14The sequence increases by 6 each step: 8 + 6 = 14.
8. Find the missing number in the sequence: 19, 26, ____, 40, 47.
33The sequence increases by 7 each step: 26 + 7 = 33.
9. Find the missing number in the sequence: 5, 15, ____, 35, 45.
25The sequence increases by 10 each step: 15 + 10 = 25.
10. Find the missing number in the sequence: 17, 21, ____, 29, 33.
25The sequence increases by 4 each step: 21 + 4 = 25.
11. Find the missing number in the sequence: 7, 11, ____, 19, 23.
15The sequence increases by 4 each step: 11 + 4 = 15.
12. Find the missing number in the sequence: 18, 26, ____, 42, 50.
34The sequence increases by 8 each step: 26 + 8 = 34.
12 questions · Seed 104737 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 10, 14, ____, 22, 26.
2. Find the missing number in the sequence: 11, 14, ____, 20, 23.
3. Find the missing number in the sequence: 17, 27, ____, 47, 57.
4. Find the missing number in the sequence: 2, 12, ____, 32, 42.
5. Find the missing number in the sequence: 9, 15, ____, 27, 33.
6. Find the missing number in the sequence: 6, 15, ____, 33, 42.
7. Find the missing number in the sequence: 2, 8, ____, 20, 26.
8. Find the missing number in the sequence: 19, 26, ____, 40, 47.
9. Find the missing number in the sequence: 5, 15, ____, 35, 45.
10. Find the missing number in the sequence: 17, 21, ____, 29, 33.
11. Find the missing number in the sequence: 7, 11, ____, 19, 23.
12. Find the missing number in the sequence: 18, 26, ____, 42, 50.
12 questions · Seed 104737 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 10, 14, ____, 22, 26.
18The sequence increases by 4 each step: 14 + 4 = 18.
2. Find the missing number in the sequence: 11, 14, ____, 20, 23.
17The sequence increases by 3 each step: 14 + 3 = 17.
3. Find the missing number in the sequence: 17, 27, ____, 47, 57.
37The sequence increases by 10 each step: 27 + 10 = 37.
4. Find the missing number in the sequence: 2, 12, ____, 32, 42.
22The sequence increases by 10 each step: 12 + 10 = 22.
5. Find the missing number in the sequence: 9, 15, ____, 27, 33.
21The sequence increases by 6 each step: 15 + 6 = 21.
6. Find the missing number in the sequence: 6, 15, ____, 33, 42.
24The sequence increases by 9 each step: 15 + 9 = 24.
7. Find the missing number in the sequence: 2, 8, ____, 20, 26.
14The sequence increases by 6 each step: 8 + 6 = 14.
8. Find the missing number in the sequence: 19, 26, ____, 40, 47.
33The sequence increases by 7 each step: 26 + 7 = 33.
9. Find the missing number in the sequence: 5, 15, ____, 35, 45.
25The sequence increases by 10 each step: 15 + 10 = 25.
10. Find the missing number in the sequence: 17, 21, ____, 29, 33.
25The sequence increases by 4 each step: 21 + 4 = 25.
11. Find the missing number in the sequence: 7, 11, ____, 19, 23.
15The sequence increases by 4 each step: 11 + 4 = 15.
12. Find the missing number in the sequence: 18, 26, ____, 42, 50.
34The sequence increases by 8 each step: 26 + 8 = 34.
12 questions · Seed 104737 · Age guidance, not curriculum certification