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 86 · 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: 4, 5, ____, 7, 8.
6
The sequence increases by 1 each step: 5 + 1 = 6.
3. Find the missing number in the sequence: 12, 17, ____, 27, 32.
22
The sequence increases by 5 each step: 17 + 5 = 22.
4. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5
The sequence increases by 1 each step: 4 + 1 = 5.
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: 1, 6, ____, 16, 21.
11
The sequence increases by 5 each step: 6 + 5 = 11.
7. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13
The sequence increases by 2 each step: 11 + 2 = 13.
8. Find the missing number in the sequence: 7, 12, ____, 22, 27.
17
The sequence increases by 5 each step: 12 + 5 = 17.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20
The sequence increases by 5 each step: 15 + 5 = 20.
10. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22
The sequence increases by 1 each step: 21 + 1 = 22.
11. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24
The sequence increases by 5 each step: 19 + 5 = 24.
12. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16
The sequence increases by 5 each step: 11 + 5 = 16.

12 questions · Seed 86 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 4-6

Take your time. Show your thinking.

12 questions · Seed 86 · 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: 4, 5, ____, 7, 8.
6
The sequence increases by 1 each step: 5 + 1 = 6.
3. Find the missing number in the sequence: 12, 17, ____, 27, 32.
22
The sequence increases by 5 each step: 17 + 5 = 22.
4. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5
The sequence increases by 1 each step: 4 + 1 = 5.
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: 1, 6, ____, 16, 21.
11
The sequence increases by 5 each step: 6 + 5 = 11.
7. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13
The sequence increases by 2 each step: 11 + 2 = 13.
8. Find the missing number in the sequence: 7, 12, ____, 22, 27.
17
The sequence increases by 5 each step: 12 + 5 = 17.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20
The sequence increases by 5 each step: 15 + 5 = 20.
10. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22
The sequence increases by 1 each step: 21 + 1 = 22.
11. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24
The sequence increases by 5 each step: 19 + 5 = 24.
12. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16
The sequence increases by 5 each step: 11 + 5 = 16.

12 questions · Seed 86 · Age guidance, not curriculum certification