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 104741 · 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: 11, 16, ____, 26, 31.
21
The sequence increases by 5 each step: 16 + 5 = 21.
2. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13
The sequence increases by 1 each step: 12 + 1 = 13.
3. Find the missing number in the sequence: 20, 22, ____, 26, 28.
24
The sequence increases by 2 each step: 22 + 2 = 24.
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: 12, 17, ____, 27, 32.
22
The sequence increases by 5 each step: 17 + 5 = 22.
6. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20
The sequence increases by 2 each step: 18 + 2 = 20.
7. Find the missing number in the sequence: 19, 24, ____, 34, 39.
29
The sequence increases by 5 each step: 24 + 5 = 29.
8. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16
The sequence increases by 5 each step: 11 + 5 = 16.
9. Find the missing number in the sequence: 3, 8, ____, 18, 23.
13
The sequence increases by 5 each step: 8 + 5 = 13.
10. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20
The sequence increases by 1 each step: 19 + 1 = 20.
11. Find the missing number in the sequence: 4, 9, ____, 19, 24.
14
The sequence increases by 5 each step: 9 + 5 = 14.
12. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5
The sequence increases by 1 each step: 4 + 1 = 5.

12 questions · Seed 104741 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 4-6

Take your time. Show your thinking.

12 questions · Seed 104741 · 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: 11, 16, ____, 26, 31.
21
The sequence increases by 5 each step: 16 + 5 = 21.
2. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13
The sequence increases by 1 each step: 12 + 1 = 13.
3. Find the missing number in the sequence: 20, 22, ____, 26, 28.
24
The sequence increases by 2 each step: 22 + 2 = 24.
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: 12, 17, ____, 27, 32.
22
The sequence increases by 5 each step: 17 + 5 = 22.
6. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20
The sequence increases by 2 each step: 18 + 2 = 20.
7. Find the missing number in the sequence: 19, 24, ____, 34, 39.
29
The sequence increases by 5 each step: 24 + 5 = 29.
8. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16
The sequence increases by 5 each step: 11 + 5 = 16.
9. Find the missing number in the sequence: 3, 8, ____, 18, 23.
13
The sequence increases by 5 each step: 8 + 5 = 13.
10. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20
The sequence increases by 1 each step: 19 + 1 = 20.
11. Find the missing number in the sequence: 4, 9, ____, 19, 24.
14
The sequence increases by 5 each step: 9 + 5 = 14.
12. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5
The sequence increases by 1 each step: 4 + 1 = 5.

12 questions · Seed 104741 · Age guidance, not curriculum certification