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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: 2, 4, ____, 8, 10.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
4. Find the missing number in the sequence: 15, 20, ____, 30, 35.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
6. Find the missing number in the sequence: 17, 22, ____, 32, 37.
7. Find the missing number in the sequence: 5, 6, ____, 8, 9.
8. Find the missing number in the sequence: 18, 23, ____, 33, 38.
9. Find the missing number in the sequence: 4, 5, ____, 7, 8.
10. Find the missing number in the sequence: 13, 15, ____, 19, 21.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12. Find the missing number in the sequence: 17, 19, ____, 23, 25.
12 questions · Seed 104729 · 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: 2, 4, ____, 8, 10.
6The sequence increases by 2 each step: 4 + 2 = 6.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
4. Find the missing number in the sequence: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
14The sequence increases by 5 each step: 9 + 5 = 14.
6. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
7. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
8. Find the missing number in the sequence: 18, 23, ____, 33, 38.
28The sequence increases by 5 each step: 23 + 5 = 28.
9. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
10. Find the missing number in the sequence: 13, 15, ____, 19, 21.
17The sequence increases by 2 each step: 15 + 2 = 17.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
12. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
12 questions · Seed 104729 · 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: 2, 4, ____, 8, 10.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
4. Find the missing number in the sequence: 15, 20, ____, 30, 35.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
6. Find the missing number in the sequence: 17, 22, ____, 32, 37.
7. Find the missing number in the sequence: 5, 6, ____, 8, 9.
8. Find the missing number in the sequence: 18, 23, ____, 33, 38.
9. Find the missing number in the sequence: 4, 5, ____, 7, 8.
10. Find the missing number in the sequence: 13, 15, ____, 19, 21.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12. Find the missing number in the sequence: 17, 19, ____, 23, 25.
12 questions · Seed 104729 · 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: 2, 4, ____, 8, 10.
6The sequence increases by 2 each step: 4 + 2 = 6.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
4. Find the missing number in the sequence: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
5. Find the missing number in the sequence: 4, 9, ____, 19, 24.
14The sequence increases by 5 each step: 9 + 5 = 14.
6. Find the missing number in the sequence: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
7. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
8. Find the missing number in the sequence: 18, 23, ____, 33, 38.
28The sequence increases by 5 each step: 23 + 5 = 28.
9. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
10. Find the missing number in the sequence: 13, 15, ____, 19, 21.
17The sequence increases by 2 each step: 15 + 2 = 17.
11. Find the missing number in the sequence: 10, 11, ____, 13, 14.
12The sequence increases by 1 each step: 11 + 1 = 12.
12. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
12 questions · Seed 104729 · Age guidance, not curriculum certification