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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: 10, 11, ____, 13, 14.
2. Find the missing number in the sequence: 11, 12, ____, 14, 15.
3. Find the missing number in the sequence: 17, 22, ____, 32, 37.
4. Find the missing number in the sequence: 2, 7, ____, 17, 22.
5. Find the missing number in the sequence: 9, 11, ____, 15, 17.
6. Find the missing number in the sequence: 6, 11, ____, 21, 26.
7. Find the missing number in the sequence: 2, 3, ____, 5, 6.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
9. Find the missing number in the sequence: 5, 10, ____, 20, 25.
10. Find the missing number in the sequence: 17, 18, ____, 20, 21.
11. Find the missing number in the sequence: 7, 8, ____, 10, 11.
12. Find the missing number in the sequence: 18, 20, ____, 24, 26.
12 questions · Seed 104737 · 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: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
2. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
3. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
4. Find the missing number in the sequence: 2, 7, ____, 17, 22.
12The sequence increases by 5 each step: 7 + 5 = 12.
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: 6, 11, ____, 21, 26.
16The sequence increases by 5 each step: 11 + 5 = 16.
7. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4The sequence increases by 1 each step: 3 + 1 = 4.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
9. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
10. Find the missing number in the sequence: 17, 18, ____, 20, 21.
19The sequence increases by 1 each step: 18 + 1 = 19.
11. Find the missing number in the sequence: 7, 8, ____, 10, 11.
9The sequence increases by 1 each step: 8 + 1 = 9.
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 104737 · 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: 10, 11, ____, 13, 14.
2. Find the missing number in the sequence: 11, 12, ____, 14, 15.
3. Find the missing number in the sequence: 17, 22, ____, 32, 37.
4. Find the missing number in the sequence: 2, 7, ____, 17, 22.
5. Find the missing number in the sequence: 9, 11, ____, 15, 17.
6. Find the missing number in the sequence: 6, 11, ____, 21, 26.
7. Find the missing number in the sequence: 2, 3, ____, 5, 6.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
9. Find the missing number in the sequence: 5, 10, ____, 20, 25.
10. Find the missing number in the sequence: 17, 18, ____, 20, 21.
11. Find the missing number in the sequence: 7, 8, ____, 10, 11.
12. Find the missing number in the sequence: 18, 20, ____, 24, 26.
12 questions · Seed 104737 · 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: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
2. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
3. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
4. Find the missing number in the sequence: 2, 7, ____, 17, 22.
12The sequence increases by 5 each step: 7 + 5 = 12.
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: 6, 11, ____, 21, 26.
16The sequence increases by 5 each step: 11 + 5 = 16.
7. Find the missing number in the sequence: 2, 3, ____, 5, 6.
4The sequence increases by 1 each step: 3 + 1 = 4.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
9. Find the missing number in the sequence: 5, 10, ____, 20, 25.
15The sequence increases by 5 each step: 10 + 5 = 15.
10. Find the missing number in the sequence: 17, 18, ____, 20, 21.
19The sequence increases by 1 each step: 18 + 1 = 19.
11. Find the missing number in the sequence: 7, 8, ____, 10, 11.
9The sequence increases by 1 each step: 8 + 1 = 9.
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 104737 · Age guidance, not curriculum certification