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: 6, 8, ____, 12, 14.
2. Find the missing number in the sequence: 6, 7, ____, 9, 10.
3. Find the missing number in the sequence: 20, 25, ____, 35, 40.
4. Find the missing number in the sequence: 8, 9, ____, 11, 12.
5. Find the missing number in the sequence: 4, 6, ____, 10, 12.
6. Find the missing number in the sequence: 10, 11, ____, 13, 14.
7. Find the missing number in the sequence: 15, 17, ____, 21, 23.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
9. Find the missing number in the sequence: 17, 22, ____, 32, 37.
10. Find the missing number in the sequence: 3, 4, ____, 6, 7.
11. Find the missing number in the sequence: 7, 9, ____, 13, 15.
12. Find the missing number in the sequence: 18, 20, ____, 24, 26.
12 questions · Seed 104735 · 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: 6, 8, ____, 12, 14.
10The sequence increases by 2 each step: 8 + 2 = 10.
2. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
3. Find the missing number in the sequence: 20, 25, ____, 35, 40.
30The sequence increases by 5 each step: 25 + 5 = 30.
4. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10The sequence increases by 1 each step: 9 + 1 = 10.
5. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
6. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
7. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
9. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
10. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
11. Find the missing number in the sequence: 7, 9, ____, 13, 15.
11The sequence increases by 2 each step: 9 + 2 = 11.
12. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
12 questions · Seed 104735 · 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: 6, 8, ____, 12, 14.
2. Find the missing number in the sequence: 6, 7, ____, 9, 10.
3. Find the missing number in the sequence: 20, 25, ____, 35, 40.
4. Find the missing number in the sequence: 8, 9, ____, 11, 12.
5. Find the missing number in the sequence: 4, 6, ____, 10, 12.
6. Find the missing number in the sequence: 10, 11, ____, 13, 14.
7. Find the missing number in the sequence: 15, 17, ____, 21, 23.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
9. Find the missing number in the sequence: 17, 22, ____, 32, 37.
10. Find the missing number in the sequence: 3, 4, ____, 6, 7.
11. Find the missing number in the sequence: 7, 9, ____, 13, 15.
12. Find the missing number in the sequence: 18, 20, ____, 24, 26.
12 questions · Seed 104735 · 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: 6, 8, ____, 12, 14.
10The sequence increases by 2 each step: 8 + 2 = 10.
2. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
3. Find the missing number in the sequence: 20, 25, ____, 35, 40.
30The sequence increases by 5 each step: 25 + 5 = 30.
4. Find the missing number in the sequence: 8, 9, ____, 11, 12.
10The sequence increases by 1 each step: 9 + 1 = 10.
5. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
6. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
7. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
9. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
10. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
11. Find the missing number in the sequence: 7, 9, ____, 13, 15.
11The sequence increases by 2 each step: 9 + 2 = 11.
12. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
12 questions · Seed 104735 · Age guidance, not curriculum certification