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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: 2, 4, ____, 8, 10.
2. Find the missing number in the sequence: 12, 13, ____, 15, 16.
3. Find the missing number in the sequence: 5, 7, ____, 11, 13.
4. Find the missing number in the sequence: 6, 7, ____, 9, 10.
5. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
7. Find the missing number in the sequence: 9, 11, ____, 15, 17.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
9. Find the missing number in the sequence: 15, 20, ____, 30, 35.
10. Find the missing number in the sequence: 9, 14, ____, 24, 29.
11. Find the missing number in the sequence: 14, 19, ____, 29, 34.
12. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12 questions · Seed 104750 · 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: 2, 4, ____, 8, 10.
6The sequence increases by 2 each step: 4 + 2 = 6.
2. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14The sequence increases by 1 each step: 13 + 1 = 14.
3. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9The sequence increases by 2 each step: 7 + 2 = 9.
4. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
5. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
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: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
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: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
10. Find the missing number in the sequence: 9, 14, ____, 24, 29.
19The sequence increases by 5 each step: 14 + 5 = 19.
11. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
12. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
12 questions · Seed 104750 · 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: 2, 4, ____, 8, 10.
2. Find the missing number in the sequence: 12, 13, ____, 15, 16.
3. Find the missing number in the sequence: 5, 7, ____, 11, 13.
4. Find the missing number in the sequence: 6, 7, ____, 9, 10.
5. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
7. Find the missing number in the sequence: 9, 11, ____, 15, 17.
8. Find the missing number in the sequence: 14, 15, ____, 17, 18.
9. Find the missing number in the sequence: 15, 20, ____, 30, 35.
10. Find the missing number in the sequence: 9, 14, ____, 24, 29.
11. Find the missing number in the sequence: 14, 19, ____, 29, 34.
12. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12 questions · Seed 104750 · 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: 2, 4, ____, 8, 10.
6The sequence increases by 2 each step: 4 + 2 = 6.
2. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14The sequence increases by 1 each step: 13 + 1 = 14.
3. Find the missing number in the sequence: 5, 7, ____, 11, 13.
9The sequence increases by 2 each step: 7 + 2 = 9.
4. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
5. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
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: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
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: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
10. Find the missing number in the sequence: 9, 14, ____, 24, 29.
19The sequence increases by 5 each step: 14 + 5 = 19.
11. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
12. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
12 questions · Seed 104750 · Age guidance, not curriculum certification