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: 7, 12, ____, 22, 27.
2. Find the missing number in the sequence: 6, 11, ____, 21, 26.
3. Find the missing number in the sequence: 19, 24, ____, 34, 39.
4. Find the missing number in the sequence: 16, 21, ____, 31, 36.
5. Find the missing number in the sequence: 16, 18, ____, 22, 24.
6. Find the missing number in the sequence: 13, 18, ____, 28, 33.
7. Find the missing number in the sequence: 7, 8, ____, 10, 11.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
9. Find the missing number in the sequence: 6, 7, ____, 9, 10.
10. Find the missing number in the sequence: 5, 7, ____, 11, 13.
11. Find the missing number in the sequence: 17, 19, ____, 23, 25.
12. Find the missing number in the sequence: 15, 20, ____, 30, 35.
12 questions · Seed 46 · 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: 7, 12, ____, 22, 27.
17The sequence increases by 5 each step: 12 + 5 = 17.
2. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16The sequence increases by 5 each step: 11 + 5 = 16.
3. Find the missing number in the sequence: 19, 24, ____, 34, 39.
29The sequence increases by 5 each step: 24 + 5 = 29.
4. Find the missing number in the sequence: 16, 21, ____, 31, 36.
26The sequence increases by 5 each step: 21 + 5 = 26.
5. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
6. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
7. Find the missing number in the sequence: 7, 8, ____, 10, 11.
9The sequence increases by 1 each step: 8 + 1 = 9.
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: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
10. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9The sequence increases by 2 each step: 7 + 2 = 9.
11. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
12. Find the missing number in the sequence: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
12 questions · Seed 46 · 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: 7, 12, ____, 22, 27.
2. Find the missing number in the sequence: 6, 11, ____, 21, 26.
3. Find the missing number in the sequence: 19, 24, ____, 34, 39.
4. Find the missing number in the sequence: 16, 21, ____, 31, 36.
5. Find the missing number in the sequence: 16, 18, ____, 22, 24.
6. Find the missing number in the sequence: 13, 18, ____, 28, 33.
7. Find the missing number in the sequence: 7, 8, ____, 10, 11.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
9. Find the missing number in the sequence: 6, 7, ____, 9, 10.
10. Find the missing number in the sequence: 5, 7, ____, 11, 13.
11. Find the missing number in the sequence: 17, 19, ____, 23, 25.
12. Find the missing number in the sequence: 15, 20, ____, 30, 35.
12 questions · Seed 46 · 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: 7, 12, ____, 22, 27.
17The sequence increases by 5 each step: 12 + 5 = 17.
2. Find the missing number in the sequence: 6, 11, ____, 21, 26.
16The sequence increases by 5 each step: 11 + 5 = 16.
3. Find the missing number in the sequence: 19, 24, ____, 34, 39.
29The sequence increases by 5 each step: 24 + 5 = 29.
4. Find the missing number in the sequence: 16, 21, ____, 31, 36.
26The sequence increases by 5 each step: 21 + 5 = 26.
5. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
6. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
7. Find the missing number in the sequence: 7, 8, ____, 10, 11.
9The sequence increases by 1 each step: 8 + 1 = 9.
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: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
10. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9The sequence increases by 2 each step: 7 + 2 = 9.
11. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
12. Find the missing number in the sequence: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
12 questions · Seed 46 · Age guidance, not curriculum certification