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 48 · 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: 6, 7, ____, 9, 10.
8
The sequence increases by 1 each step: 7 + 1 = 8.
2. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9
The sequence increases by 2 each step: 7 + 2 = 9.
3. Find the missing number in the sequence: 1, 3, ____, 7, 9.
5
The sequence increases by 2 each step: 3 + 2 = 5.
4. Find the missing number in the sequence: 1, 6, ____, 16, 21.
11
The sequence increases by 5 each step: 6 + 5 = 11.
5. Find the missing number in the sequence: 3, 5, ____, 9, 11.
7
The sequence increases by 2 each step: 5 + 2 = 7.
6. Find the missing number in the sequence: 2, 4, ____, 8, 10.
6
The sequence increases by 2 each step: 4 + 2 = 6.
7. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14
The sequence increases by 1 each step: 13 + 1 = 14.
8. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10
The sequence increases by 1 each step: 9 + 1 = 10.
9. Find the missing number in the sequence: 13, 15, ____, 19, 21.
17
The sequence increases by 2 each step: 15 + 2 = 17.
10. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6
The sequence increases by 1 each step: 5 + 1 = 6.
11. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21
The sequence increases by 2 each step: 19 + 2 = 21.
12. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7
The sequence increases by 1 each step: 6 + 1 = 7.

12 questions · Seed 48 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 4-6

Take your time. Show your thinking.

12 questions · Seed 48 · 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: 6, 7, ____, 9, 10.
8
The sequence increases by 1 each step: 7 + 1 = 8.
2. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9
The sequence increases by 2 each step: 7 + 2 = 9.
3. Find the missing number in the sequence: 1, 3, ____, 7, 9.
5
The sequence increases by 2 each step: 3 + 2 = 5.
4. Find the missing number in the sequence: 1, 6, ____, 16, 21.
11
The sequence increases by 5 each step: 6 + 5 = 11.
5. Find the missing number in the sequence: 3, 5, ____, 9, 11.
7
The sequence increases by 2 each step: 5 + 2 = 7.
6. Find the missing number in the sequence: 2, 4, ____, 8, 10.
6
The sequence increases by 2 each step: 4 + 2 = 6.
7. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14
The sequence increases by 1 each step: 13 + 1 = 14.
8. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10
The sequence increases by 1 each step: 9 + 1 = 10.
9. Find the missing number in the sequence: 13, 15, ____, 19, 21.
17
The sequence increases by 2 each step: 15 + 2 = 17.
10. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6
The sequence increases by 1 each step: 5 + 1 = 6.
11. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21
The sequence increases by 2 each step: 19 + 2 = 21.
12. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7
The sequence increases by 1 each step: 6 + 1 = 7.

12 questions · Seed 48 · Age guidance, not curriculum certification