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 82 · 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: 5, 7, ____, 11, 13.
9
The sequence increases by 2 each step: 7 + 2 = 9.
2. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8
The sequence increases by 2 each step: 6 + 2 = 8.
3. Find the missing number in the sequence: 19, 20, ____, 22, 23.
21
The sequence increases by 1 each step: 20 + 1 = 21.
4. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8
The sequence increases by 1 each step: 7 + 1 = 8.
5. Find the missing number in the sequence: 20, 22, ____, 26, 28.
24
The sequence increases by 2 each step: 22 + 2 = 24.
6. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21
The sequence increases by 2 each step: 19 + 2 = 21.
7. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5
The sequence increases by 1 each step: 4 + 1 = 5.
8. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20
The sequence increases by 1 each step: 19 + 1 = 20.
9. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22
The sequence increases by 1 each step: 21 + 1 = 22.
10. Find the missing number in the sequence: 6, 8, ____, 12, 14.
10
The sequence increases by 2 each step: 8 + 2 = 10.
11. Find the missing number in the sequence: 7, 9, ____, 13, 15.
11
The sequence increases by 2 each step: 9 + 2 = 11.
12. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4
The sequence increases by 1 each step: 3 + 1 = 4.

12 questions · Seed 82 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 4-6

Take your time. Show your thinking.

12 questions · Seed 82 · 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: 5, 7, ____, 11, 13.
9
The sequence increases by 2 each step: 7 + 2 = 9.
2. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8
The sequence increases by 2 each step: 6 + 2 = 8.
3. Find the missing number in the sequence: 19, 20, ____, 22, 23.
21
The sequence increases by 1 each step: 20 + 1 = 21.
4. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8
The sequence increases by 1 each step: 7 + 1 = 8.
5. Find the missing number in the sequence: 20, 22, ____, 26, 28.
24
The sequence increases by 2 each step: 22 + 2 = 24.
6. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21
The sequence increases by 2 each step: 19 + 2 = 21.
7. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5
The sequence increases by 1 each step: 4 + 1 = 5.
8. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20
The sequence increases by 1 each step: 19 + 1 = 20.
9. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22
The sequence increases by 1 each step: 21 + 1 = 22.
10. Find the missing number in the sequence: 6, 8, ____, 12, 14.
10
The sequence increases by 2 each step: 8 + 2 = 10.
11. Find the missing number in the sequence: 7, 9, ____, 13, 15.
11
The sequence increases by 2 each step: 9 + 2 = 11.
12. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4
The sequence increases by 1 each step: 3 + 1 = 4.

12 questions · Seed 82 · Age guidance, not curriculum certification