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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 7-9
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 16, 26, ____, 46, 56.
2. Find the missing number in the sequence: 1, 8, ____, 22, 29.
3. Find the missing number in the sequence: 4, 10, ____, 22, 28.
4. Find the missing number in the sequence: 15, 24, ____, 42, 51.
5. Find the missing number in the sequence: 8, 15, ____, 29, 36.
6. Find the missing number in the sequence: 2, 10, ____, 26, 34.
7. Find the missing number in the sequence: 3, 13, ____, 33, 43.
8. Find the missing number in the sequence: 3, 11, ____, 27, 35.
9. Find the missing number in the sequence: 9, 12, ____, 18, 21.
10. Find the missing number in the sequence: 8, 12, ____, 20, 24.
11. Find the missing number in the sequence: 11, 15, ____, 23, 27.
12. Find the missing number in the sequence: 4, 11, ____, 25, 32.
12 questions · Seed 104745 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 16, 26, ____, 46, 56.
36The sequence increases by 10 each step: 26 + 10 = 36.
2. Find the missing number in the sequence: 1, 8, ____, 22, 29.
15The sequence increases by 7 each step: 8 + 7 = 15.
3. Find the missing number in the sequence: 4, 10, ____, 22, 28.
16The sequence increases by 6 each step: 10 + 6 = 16.
4. Find the missing number in the sequence: 15, 24, ____, 42, 51.
33The sequence increases by 9 each step: 24 + 9 = 33.
5. Find the missing number in the sequence: 8, 15, ____, 29, 36.
22The sequence increases by 7 each step: 15 + 7 = 22.
6. Find the missing number in the sequence: 2, 10, ____, 26, 34.
18The sequence increases by 8 each step: 10 + 8 = 18.
7. Find the missing number in the sequence: 3, 13, ____, 33, 43.
23The sequence increases by 10 each step: 13 + 10 = 23.
8. Find the missing number in the sequence: 3, 11, ____, 27, 35.
19The sequence increases by 8 each step: 11 + 8 = 19.
9. Find the missing number in the sequence: 9, 12, ____, 18, 21.
15The sequence increases by 3 each step: 12 + 3 = 15.
10. Find the missing number in the sequence: 8, 12, ____, 20, 24.
16The sequence increases by 4 each step: 12 + 4 = 16.
11. Find the missing number in the sequence: 11, 15, ____, 23, 27.
19The sequence increases by 4 each step: 15 + 4 = 19.
12. Find the missing number in the sequence: 4, 11, ____, 25, 32.
18The sequence increases by 7 each step: 11 + 7 = 18.
12 questions · Seed 104745 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Missing sequence terms
Take your time. Show your thinking.
1. Find the missing number in the sequence: 16, 26, ____, 46, 56.
2. Find the missing number in the sequence: 1, 8, ____, 22, 29.
3. Find the missing number in the sequence: 4, 10, ____, 22, 28.
4. Find the missing number in the sequence: 15, 24, ____, 42, 51.
5. Find the missing number in the sequence: 8, 15, ____, 29, 36.
6. Find the missing number in the sequence: 2, 10, ____, 26, 34.
7. Find the missing number in the sequence: 3, 13, ____, 33, 43.
8. Find the missing number in the sequence: 3, 11, ____, 27, 35.
9. Find the missing number in the sequence: 9, 12, ____, 18, 21.
10. Find the missing number in the sequence: 8, 12, ____, 20, 24.
11. Find the missing number in the sequence: 11, 15, ____, 23, 27.
12. Find the missing number in the sequence: 4, 11, ____, 25, 32.
12 questions · Seed 104745 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Missing sequence terms
Answers and reasoning. Review before teaching.
1. Find the missing number in the sequence: 16, 26, ____, 46, 56.
36The sequence increases by 10 each step: 26 + 10 = 36.
2. Find the missing number in the sequence: 1, 8, ____, 22, 29.
15The sequence increases by 7 each step: 8 + 7 = 15.
3. Find the missing number in the sequence: 4, 10, ____, 22, 28.
16The sequence increases by 6 each step: 10 + 6 = 16.
4. Find the missing number in the sequence: 15, 24, ____, 42, 51.
33The sequence increases by 9 each step: 24 + 9 = 33.
5. Find the missing number in the sequence: 8, 15, ____, 29, 36.
22The sequence increases by 7 each step: 15 + 7 = 22.
6. Find the missing number in the sequence: 2, 10, ____, 26, 34.
18The sequence increases by 8 each step: 10 + 8 = 18.
7. Find the missing number in the sequence: 3, 13, ____, 33, 43.
23The sequence increases by 10 each step: 13 + 10 = 23.
8. Find the missing number in the sequence: 3, 11, ____, 27, 35.
19The sequence increases by 8 each step: 11 + 8 = 19.
9. Find the missing number in the sequence: 9, 12, ____, 18, 21.
15The sequence increases by 3 each step: 12 + 3 = 15.
10. Find the missing number in the sequence: 8, 12, ____, 20, 24.
16The sequence increases by 4 each step: 12 + 4 = 16.
11. Find the missing number in the sequence: 11, 15, ____, 23, 27.
19The sequence increases by 4 each step: 15 + 4 = 19.
12. Find the missing number in the sequence: 4, 11, ____, 25, 32.
18The sequence increases by 7 each step: 11 + 7 = 18.
12 questions · Seed 104745 · Age guidance, not curriculum certification