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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: 11, 13, ____, 17, 19.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
3. Find the missing number in the sequence: 6, 7, ____, 9, 10.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
7. Find the missing number in the sequence: 16, 21, ____, 31, 36.
8. Find the missing number in the sequence: 8, 10, ____, 14, 16.
9. Find the missing number in the sequence: 13, 15, ____, 19, 21.
10. Find the missing number in the sequence: 9, 14, ____, 24, 29.
11. Find the missing number in the sequence: 11, 12, ____, 14, 15.
12. Find the missing number in the sequence: 19, 24, ____, 34, 39.
12 questions · Seed 104730 · 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, 13, ____, 17, 19.
15The sequence increases by 2 each step: 13 + 2 = 15.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
3. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22The sequence increases by 1 each step: 21 + 1 = 22.
7. Find the missing number in the sequence: 16, 21, ____, 31, 36.
26The sequence increases by 5 each step: 21 + 5 = 26.
8. Find the missing number in the sequence: 8, 10, ____, 14, 16.
12The sequence increases by 2 each step: 10 + 2 = 12.
9. Find the missing number in the sequence: 13, 15, ____, 19, 21.
17The sequence increases by 2 each step: 15 + 2 = 17.
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: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
12. Find the missing number in the sequence: 19, 24, ____, 34, 39.
29The sequence increases by 5 each step: 24 + 5 = 29.
12 questions · Seed 104730 · 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, 13, ____, 17, 19.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
3. Find the missing number in the sequence: 6, 7, ____, 9, 10.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
7. Find the missing number in the sequence: 16, 21, ____, 31, 36.
8. Find the missing number in the sequence: 8, 10, ____, 14, 16.
9. Find the missing number in the sequence: 13, 15, ____, 19, 21.
10. Find the missing number in the sequence: 9, 14, ____, 24, 29.
11. Find the missing number in the sequence: 11, 12, ____, 14, 15.
12. Find the missing number in the sequence: 19, 24, ____, 34, 39.
12 questions · Seed 104730 · 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, 13, ____, 17, 19.
15The sequence increases by 2 each step: 13 + 2 = 15.
2. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
3. Find the missing number in the sequence: 6, 7, ____, 9, 10.
8The sequence increases by 1 each step: 7 + 1 = 8.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
5. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
6. Find the missing number in the sequence: 20, 21, ____, 23, 24.
22The sequence increases by 1 each step: 21 + 1 = 22.
7. Find the missing number in the sequence: 16, 21, ____, 31, 36.
26The sequence increases by 5 each step: 21 + 5 = 26.
8. Find the missing number in the sequence: 8, 10, ____, 14, 16.
12The sequence increases by 2 each step: 10 + 2 = 12.
9. Find the missing number in the sequence: 13, 15, ____, 19, 21.
17The sequence increases by 2 each step: 15 + 2 = 17.
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: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
12. Find the missing number in the sequence: 19, 24, ____, 34, 39.
29The sequence increases by 5 each step: 24 + 5 = 29.
12 questions · Seed 104730 · Age guidance, not curriculum certification