ReasoningAges 4-6

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 4-6

Take your time. Show your thinking.

12 questions · Seed 76 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 4-6

Answers and reasoning. Review before teaching.

1. Find the missing number in the sequence: 7, 8, ____, 10, 11.
9
The sequence increases by 1 each step: 8 + 1 = 9.
2. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10
The sequence increases by 1 each step: 9 + 1 = 10.
3. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27
The sequence increases by 5 each step: 22 + 5 = 27.
4. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4
The sequence increases by 1 each step: 3 + 1 = 4.
5. Find the missing number in the sequence: 13, 14, ____, 16, 17.
15
The sequence increases by 1 each step: 14 + 1 = 15.
6. Find the missing number in the sequence: 1, 6, ____, 16, 21.
11
The sequence increases by 5 each step: 6 + 5 = 11.
7. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20
The sequence increases by 2 each step: 18 + 2 = 20.
8. Find the missing number in the sequence: 1, 3, ____, 7, 9.
5
The sequence increases by 2 each step: 3 + 2 = 5.
9. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9
The sequence increases by 2 each step: 7 + 2 = 9.
10. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3
The sequence increases by 1 each step: 2 + 1 = 3.
11. Find the missing number in the sequence: 9, 10, ____, 12, 13.
11
The sequence increases by 1 each step: 10 + 1 = 11.
12. Find the missing number in the sequence: 8, 10, ____, 14, 16.
12
The sequence increases by 2 each step: 10 + 2 = 12.

12 questions · Seed 76 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 4-6

Take your time. Show your thinking.

12 questions · Seed 76 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 4-6

Answers and reasoning. Review before teaching.

1. Find the missing number in the sequence: 7, 8, ____, 10, 11.
9
The sequence increases by 1 each step: 8 + 1 = 9.
2. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10
The sequence increases by 1 each step: 9 + 1 = 10.
3. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27
The sequence increases by 5 each step: 22 + 5 = 27.
4. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4
The sequence increases by 1 each step: 3 + 1 = 4.
5. Find the missing number in the sequence: 13, 14, ____, 16, 17.
15
The sequence increases by 1 each step: 14 + 1 = 15.
6. Find the missing number in the sequence: 1, 6, ____, 16, 21.
11
The sequence increases by 5 each step: 6 + 5 = 11.
7. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20
The sequence increases by 2 each step: 18 + 2 = 20.
8. Find the missing number in the sequence: 1, 3, ____, 7, 9.
5
The sequence increases by 2 each step: 3 + 2 = 5.
9. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9
The sequence increases by 2 each step: 7 + 2 = 9.
10. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3
The sequence increases by 1 each step: 2 + 1 = 3.
11. Find the missing number in the sequence: 9, 10, ____, 12, 13.
11
The sequence increases by 1 each step: 10 + 1 = 11.
12. Find the missing number in the sequence: 8, 10, ____, 14, 16.
12
The sequence increases by 2 each step: 10 + 2 = 12.

12 questions · Seed 76 · Age guidance, not curriculum certification