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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, 3, ____, 5, 6.
2. Find the missing number in the sequence: 17, 19, ____, 23, 25.
3. Find the missing number in the sequence: 9, 11, ____, 15, 17.
4. Find the missing number in the sequence: 2, 7, ____, 17, 22.
5. Find the missing number in the sequence: 11, 13, ____, 17, 19.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
7. Find the missing number in the sequence: 4, 9, ____, 19, 24.
8. Find the missing number in the sequence: 7, 12, ____, 22, 27.
9. Find the missing number in the sequence: 17, 22, ____, 32, 37.
10. Find the missing number in the sequence: 4, 6, ____, 10, 12.
11. Find the missing number in the sequence: 16, 17, ____, 19, 20.
12. Find the missing number in the sequence: 11, 16, ____, 26, 31.
12 questions · Seed 56 · 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, 3, ____, 5, 6.
4The sequence increases by 1 each step: 3 + 1 = 4.
2. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
3. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
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: 11, 13, ____, 17, 19.
15The sequence increases by 2 each step: 13 + 2 = 15.
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: 4, 9, ____, 19, 24.
14The sequence increases by 5 each step: 9 + 5 = 14.
8. Find the missing number in the sequence: 7, 12, ____, 22, 27.
17The sequence increases by 5 each step: 12 + 5 = 17.
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: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
11. Find the missing number in the sequence: 16, 17, ____, 19, 20.
18The sequence increases by 1 each step: 17 + 1 = 18.
12. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
12 questions · Seed 56 · 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, 3, ____, 5, 6.
2. Find the missing number in the sequence: 17, 19, ____, 23, 25.
3. Find the missing number in the sequence: 9, 11, ____, 15, 17.
4. Find the missing number in the sequence: 2, 7, ____, 17, 22.
5. Find the missing number in the sequence: 11, 13, ____, 17, 19.
6. Find the missing number in the sequence: 3, 8, ____, 18, 23.
7. Find the missing number in the sequence: 4, 9, ____, 19, 24.
8. Find the missing number in the sequence: 7, 12, ____, 22, 27.
9. Find the missing number in the sequence: 17, 22, ____, 32, 37.
10. Find the missing number in the sequence: 4, 6, ____, 10, 12.
11. Find the missing number in the sequence: 16, 17, ____, 19, 20.
12. Find the missing number in the sequence: 11, 16, ____, 26, 31.
12 questions · Seed 56 · 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, 3, ____, 5, 6.
4The sequence increases by 1 each step: 3 + 1 = 4.
2. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
3. Find the missing number in the sequence: 9, 11, ____, 15, 17.
13The sequence increases by 2 each step: 11 + 2 = 13.
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: 11, 13, ____, 17, 19.
15The sequence increases by 2 each step: 13 + 2 = 15.
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: 4, 9, ____, 19, 24.
14The sequence increases by 5 each step: 9 + 5 = 14.
8. Find the missing number in the sequence: 7, 12, ____, 22, 27.
17The sequence increases by 5 each step: 12 + 5 = 17.
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: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
11. Find the missing number in the sequence: 16, 17, ____, 19, 20.
18The sequence increases by 1 each step: 17 + 1 = 18.
12. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
12 questions · Seed 56 · Age guidance, not curriculum certification