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 104758 · 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: 12, 13, ____, 15, 16.
14
The sequence increases by 1 each step: 13 + 1 = 14.
2. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18
The sequence increases by 2 each step: 16 + 2 = 18.
3. Find the missing number in the sequence: 2, 4, ____, 8, 10.
6
The sequence increases by 2 each step: 4 + 2 = 6.
4. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15
The sequence increases by 5 each step: 10 + 5 = 15.
5. Find the missing number in the sequence: 10, 12, ____, 16, 18.
14
The sequence increases by 2 each step: 12 + 2 = 14.
6. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21
The sequence increases by 5 each step: 16 + 5 = 21.
7. Find the missing number in the sequence: 12, 17, ____, 27, 32.
22
The sequence increases by 5 each step: 17 + 5 = 22.
8. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4
The sequence increases by 1 each step: 3 + 1 = 4.
9. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10
The sequence increases by 1 each step: 9 + 1 = 10.
10. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12
The sequence increases by 1 each step: 11 + 1 = 12.
11. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20
The sequence increases by 5 each step: 15 + 5 = 20.
12. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3
The sequence increases by 1 each step: 2 + 1 = 3.

12 questions · Seed 104758 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 4-6

Take your time. Show your thinking.

12 questions · Seed 104758 · 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: 12, 13, ____, 15, 16.
14
The sequence increases by 1 each step: 13 + 1 = 14.
2. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18
The sequence increases by 2 each step: 16 + 2 = 18.
3. Find the missing number in the sequence: 2, 4, ____, 8, 10.
6
The sequence increases by 2 each step: 4 + 2 = 6.
4. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15
The sequence increases by 5 each step: 10 + 5 = 15.
5. Find the missing number in the sequence: 10, 12, ____, 16, 18.
14
The sequence increases by 2 each step: 12 + 2 = 14.
6. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21
The sequence increases by 5 each step: 16 + 5 = 21.
7. Find the missing number in the sequence: 12, 17, ____, 27, 32.
22
The sequence increases by 5 each step: 17 + 5 = 22.
8. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4
The sequence increases by 1 each step: 3 + 1 = 4.
9. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10
The sequence increases by 1 each step: 9 + 1 = 10.
10. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12
The sequence increases by 1 each step: 11 + 1 = 12.
11. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20
The sequence increases by 5 each step: 15 + 5 = 20.
12. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3
The sequence increases by 1 each step: 2 + 1 = 3.

12 questions · Seed 104758 · Age guidance, not curriculum certification