ReasoningAges 7-9

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.

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Worksheet StudioPractice pack · Ages 7-9

Take your time. Show your thinking.

12 questions · Seed 44 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 7-9

Answers and reasoning. Review before teaching.

1. Find the missing number in the sequence: 16, 22, ____, 34, 40.
28
The sequence increases by 6 each step: 22 + 6 = 28.
2. Find the missing number in the sequence: 9, 16, ____, 30, 37.
23
The sequence increases by 7 each step: 16 + 7 = 23.
3. Find the missing number in the sequence: 12, 16, ____, 24, 28.
20
The sequence increases by 4 each step: 16 + 4 = 20.
4. Find the missing number in the sequence: 4, 11, ____, 25, 32.
18
The sequence increases by 7 each step: 11 + 7 = 18.
5. Find the missing number in the sequence: 10, 14, ____, 22, 26.
18
The sequence increases by 4 each step: 14 + 4 = 18.
6. Find the missing number in the sequence: 5, 8, ____, 14, 17.
11
The sequence increases by 3 each step: 8 + 3 = 11.
7. Find the missing number in the sequence: 17, 25, ____, 41, 49.
33
The sequence increases by 8 each step: 25 + 8 = 33.
8. Find the missing number in the sequence: 4, 8, ____, 16, 20.
12
The sequence increases by 4 each step: 8 + 4 = 12.
9. Find the missing number in the sequence: 2, 11, ____, 29, 38.
20
The sequence increases by 9 each step: 11 + 9 = 20.
10. Find the missing number in the sequence: 16, 26, ____, 46, 56.
36
The sequence increases by 10 each step: 26 + 10 = 36.
11. Find the missing number in the sequence: 5, 13, ____, 29, 37.
21
The sequence increases by 8 each step: 13 + 8 = 21.
12. Find the missing number in the sequence: 14, 22, ____, 38, 46.
30
The sequence increases by 8 each step: 22 + 8 = 30.

12 questions · Seed 44 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 7-9

Take your time. Show your thinking.

12 questions · Seed 44 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 7-9

Answers and reasoning. Review before teaching.

1. Find the missing number in the sequence: 16, 22, ____, 34, 40.
28
The sequence increases by 6 each step: 22 + 6 = 28.
2. Find the missing number in the sequence: 9, 16, ____, 30, 37.
23
The sequence increases by 7 each step: 16 + 7 = 23.
3. Find the missing number in the sequence: 12, 16, ____, 24, 28.
20
The sequence increases by 4 each step: 16 + 4 = 20.
4. Find the missing number in the sequence: 4, 11, ____, 25, 32.
18
The sequence increases by 7 each step: 11 + 7 = 18.
5. Find the missing number in the sequence: 10, 14, ____, 22, 26.
18
The sequence increases by 4 each step: 14 + 4 = 18.
6. Find the missing number in the sequence: 5, 8, ____, 14, 17.
11
The sequence increases by 3 each step: 8 + 3 = 11.
7. Find the missing number in the sequence: 17, 25, ____, 41, 49.
33
The sequence increases by 8 each step: 25 + 8 = 33.
8. Find the missing number in the sequence: 4, 8, ____, 16, 20.
12
The sequence increases by 4 each step: 8 + 4 = 12.
9. Find the missing number in the sequence: 2, 11, ____, 29, 38.
20
The sequence increases by 9 each step: 11 + 9 = 20.
10. Find the missing number in the sequence: 16, 26, ____, 46, 56.
36
The sequence increases by 10 each step: 26 + 10 = 36.
11. Find the missing number in the sequence: 5, 13, ____, 29, 37.
21
The sequence increases by 8 each step: 13 + 8 = 21.
12. Find the missing number in the sequence: 14, 22, ____, 38, 46.
30
The sequence increases by 8 each step: 22 + 8 = 30.

12 questions · Seed 44 · Age guidance, not curriculum certification