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 104732 · 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: 19, 25, ____, 37, 43.
31
The sequence increases by 6 each step: 25 + 6 = 31.
2. Find the missing number in the sequence: 8, 11, ____, 17, 20.
14
The sequence increases by 3 each step: 11 + 3 = 14.
3. Find the missing number in the sequence: 4, 8, ____, 16, 20.
12
The sequence increases by 4 each step: 8 + 4 = 12.
4. Find the missing number in the sequence: 8, 14, ____, 26, 32.
20
The sequence increases by 6 each step: 14 + 6 = 20.
5. Find the missing number in the sequence: 12, 20, ____, 36, 44.
28
The sequence increases by 8 each step: 20 + 8 = 28.
6. Find the missing number in the sequence: 4, 14, ____, 34, 44.
24
The sequence increases by 10 each step: 14 + 10 = 24.
7. Find the missing number in the sequence: 16, 19, ____, 25, 28.
22
The sequence increases by 3 each step: 19 + 3 = 22.
8. Find the missing number in the sequence: 6, 10, ____, 18, 22.
14
The sequence increases by 4 each step: 10 + 4 = 14.
9. Find the missing number in the sequence: 5, 15, ____, 35, 45.
25
The sequence increases by 10 each step: 15 + 10 = 25.
10. Find the missing number in the sequence: 10, 19, ____, 37, 46.
28
The sequence increases by 9 each step: 19 + 9 = 28.
11. Find the missing number in the sequence: 18, 22, ____, 30, 34.
26
The sequence increases by 4 each step: 22 + 4 = 26.
12. Find the missing number in the sequence: 13, 22, ____, 40, 49.
31
The sequence increases by 9 each step: 22 + 9 = 31.

12 questions · Seed 104732 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 7-9

Take your time. Show your thinking.

12 questions · Seed 104732 · 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: 19, 25, ____, 37, 43.
31
The sequence increases by 6 each step: 25 + 6 = 31.
2. Find the missing number in the sequence: 8, 11, ____, 17, 20.
14
The sequence increases by 3 each step: 11 + 3 = 14.
3. Find the missing number in the sequence: 4, 8, ____, 16, 20.
12
The sequence increases by 4 each step: 8 + 4 = 12.
4. Find the missing number in the sequence: 8, 14, ____, 26, 32.
20
The sequence increases by 6 each step: 14 + 6 = 20.
5. Find the missing number in the sequence: 12, 20, ____, 36, 44.
28
The sequence increases by 8 each step: 20 + 8 = 28.
6. Find the missing number in the sequence: 4, 14, ____, 34, 44.
24
The sequence increases by 10 each step: 14 + 10 = 24.
7. Find the missing number in the sequence: 16, 19, ____, 25, 28.
22
The sequence increases by 3 each step: 19 + 3 = 22.
8. Find the missing number in the sequence: 6, 10, ____, 18, 22.
14
The sequence increases by 4 each step: 10 + 4 = 14.
9. Find the missing number in the sequence: 5, 15, ____, 35, 45.
25
The sequence increases by 10 each step: 15 + 10 = 25.
10. Find the missing number in the sequence: 10, 19, ____, 37, 46.
28
The sequence increases by 9 each step: 19 + 9 = 28.
11. Find the missing number in the sequence: 18, 22, ____, 30, 34.
26
The sequence increases by 4 each step: 22 + 4 = 26.
12. Find the missing number in the sequence: 13, 22, ____, 40, 49.
31
The sequence increases by 9 each step: 22 + 9 = 31.

12 questions · Seed 104732 · Age guidance, not curriculum certification