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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: 19, 24, ____, 34, 39.
2. Find the missing number in the sequence: 20, 25, ____, 35, 40.
3. Find the missing number in the sequence: 7, 12, ____, 22, 27.
4. Find the missing number in the sequence: 4, 5, ____, 7, 8.
5. Find the missing number in the sequence: 20, 22, ____, 26, 28.
6. Find the missing number in the sequence: 3, 4, ____, 6, 7.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
8. Find the missing number in the sequence: 4, 6, ____, 10, 12.
9. Find the missing number in the sequence: 15, 17, ____, 21, 23.
10. Find the missing number in the sequence: 15, 20, ____, 30, 35.
11. Find the missing number in the sequence: 3, 5, ____, 9, 11.
12. Find the missing number in the sequence: 14, 16, ____, 20, 22.
12 questions · Seed 104743 · 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: 19, 24, ____, 34, 39.
29The sequence increases by 5 each step: 24 + 5 = 29.
2. Find the missing number in the sequence: 20, 25, ____, 35, 40.
30The sequence increases by 5 each step: 25 + 5 = 30.
3. Find the missing number in the sequence: 7, 12, ____, 22, 27.
17The sequence increases by 5 each step: 12 + 5 = 17.
4. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
5. Find the missing number in the sequence: 20, 22, ____, 26, 28.
24The sequence increases by 2 each step: 22 + 2 = 24.
6. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
14The sequence increases by 2 each step: 12 + 2 = 14.
8. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
9. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
10. Find the missing number in the sequence: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
11. Find the missing number in the sequence: 3, 5, ____, 9, 11.
7The sequence increases by 2 each step: 5 + 2 = 7.
12. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18The sequence increases by 2 each step: 16 + 2 = 18.
12 questions · Seed 104743 · 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: 19, 24, ____, 34, 39.
2. Find the missing number in the sequence: 20, 25, ____, 35, 40.
3. Find the missing number in the sequence: 7, 12, ____, 22, 27.
4. Find the missing number in the sequence: 4, 5, ____, 7, 8.
5. Find the missing number in the sequence: 20, 22, ____, 26, 28.
6. Find the missing number in the sequence: 3, 4, ____, 6, 7.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
8. Find the missing number in the sequence: 4, 6, ____, 10, 12.
9. Find the missing number in the sequence: 15, 17, ____, 21, 23.
10. Find the missing number in the sequence: 15, 20, ____, 30, 35.
11. Find the missing number in the sequence: 3, 5, ____, 9, 11.
12. Find the missing number in the sequence: 14, 16, ____, 20, 22.
12 questions · Seed 104743 · 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: 19, 24, ____, 34, 39.
29The sequence increases by 5 each step: 24 + 5 = 29.
2. Find the missing number in the sequence: 20, 25, ____, 35, 40.
30The sequence increases by 5 each step: 25 + 5 = 30.
3. Find the missing number in the sequence: 7, 12, ____, 22, 27.
17The sequence increases by 5 each step: 12 + 5 = 17.
4. Find the missing number in the sequence: 4, 5, ____, 7, 8.
6The sequence increases by 1 each step: 5 + 1 = 6.
5. Find the missing number in the sequence: 20, 22, ____, 26, 28.
24The sequence increases by 2 each step: 22 + 2 = 24.
6. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
7. Find the missing number in the sequence: 10, 12, ____, 16, 18.
14The sequence increases by 2 each step: 12 + 2 = 14.
8. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
9. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
10. Find the missing number in the sequence: 15, 20, ____, 30, 35.
25The sequence increases by 5 each step: 20 + 5 = 25.
11. Find the missing number in the sequence: 3, 5, ____, 9, 11.
7The sequence increases by 2 each step: 5 + 2 = 7.
12. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18The sequence increases by 2 each step: 16 + 2 = 18.
12 questions · Seed 104743 · Age guidance, not curriculum certification