Back to worksheetsReasoningAges 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.
Worksheet StudioPractice pack · Ages 4-6
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 11, 16, ____, 26, 31.
2. Find the missing number in the sequence: 4, 5, ____, 7, 8.
3. Find the missing number in the sequence: 9, 10, ____, 12, 13.
4. Find the missing number in the sequence: 16, 18, ____, 22, 24.
5. Find the missing number in the sequence: 9, 11, ____, 15, 17.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
10. Find the missing number in the sequence: 8, 9, ____, 11, 12.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12. Find the missing number in the sequence: 15, 17, ____, 21, 23.
12 questions · Seed 104754 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 4-6
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
2. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
3. Find the missing number in the sequence: 9, 10, ____, 12, 13.
11The sequence increases by 1 each step: 10 + 1 = 11.
4. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
5. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
13The sequence increases by 5 each step: 8 + 5 = 13.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
16The sequence increases by 1 each step: 15 + 1 = 16.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
10. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10The sequence increases by 1 each step: 9 + 1 = 10.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
12. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
12 questions · Seed 104754 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 4-6
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 11, 16, ____, 26, 31.
2. Find the missing number in the sequence: 4, 5, ____, 7, 8.
3. Find the missing number in the sequence: 9, 10, ____, 12, 13.
4. Find the missing number in the sequence: 16, 18, ____, 22, 24.
5. Find the missing number in the sequence: 9, 11, ____, 15, 17.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
10. Find the missing number in the sequence: 8, 9, ____, 11, 12.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12. Find the missing number in the sequence: 15, 17, ____, 21, 23.
12 questions · Seed 104754 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 4-6
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
2. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
3. Find the missing number in the sequence: 9, 10, ____, 12, 13.
11The sequence increases by 1 each step: 10 + 1 = 11.
4. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
5. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
13The sequence increases by 5 each step: 8 + 5 = 13.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
16The sequence increases by 1 each step: 15 + 1 = 16.
9. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
10. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10The sequence increases by 1 each step: 9 + 1 = 10.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
12. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
12 questions · Seed 104754 · Age guidance, not curriculum certification