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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, 24, ____, 40, 48.
2. Find the missing number in the sequence: 18, 22, ____, 30, 34.
3. Find the missing number in the sequence: 19, 27, ____, 43, 51.
4. Find the missing number in the sequence: 4, 8, ____, 16, 20.
5. Find the missing number in the sequence: 12, 18, ____, 30, 36.
6. Find the missing number in the sequence: 13, 20, ____, 34, 41.
7. Find the missing number in the sequence: 12, 15, ____, 21, 24.
8. Find the missing number in the sequence: 1, 7, ____, 19, 25.
9. Find the missing number in the sequence: 20, 23, ____, 29, 32.
10. Find the missing number in the sequence: 9, 17, ____, 33, 41.
11. Find the missing number in the sequence: 12, 20, ____, 36, 44.
12. Find the missing number in the sequence: 1, 8, ____, 22, 29.
12 questions · Seed 88 · 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, 24, ____, 40, 48.
32The sequence increases by 8 each step: 24 + 8 = 32.
2. Find the missing number in the sequence: 18, 22, ____, 30, 34.
26The sequence increases by 4 each step: 22 + 4 = 26.
3. Find the missing number in the sequence: 19, 27, ____, 43, 51.
35The sequence increases by 8 each step: 27 + 8 = 35.
4. Find the missing number in the sequence: 4, 8, ____, 16, 20.
12The sequence increases by 4 each step: 8 + 4 = 12.
5. Find the missing number in the sequence: 12, 18, ____, 30, 36.
24The sequence increases by 6 each step: 18 + 6 = 24.
6. Find the missing number in the sequence: 13, 20, ____, 34, 41.
27The sequence increases by 7 each step: 20 + 7 = 27.
7. Find the missing number in the sequence: 12, 15, ____, 21, 24.
18The sequence increases by 3 each step: 15 + 3 = 18.
8. Find the missing number in the sequence: 1, 7, ____, 19, 25.
13The sequence increases by 6 each step: 7 + 6 = 13.
9. Find the missing number in the sequence: 20, 23, ____, 29, 32.
26The sequence increases by 3 each step: 23 + 3 = 26.
10. Find the missing number in the sequence: 9, 17, ____, 33, 41.
25The sequence increases by 8 each step: 17 + 8 = 25.
11. Find the missing number in the sequence: 12, 20, ____, 36, 44.
28The sequence increases by 8 each step: 20 + 8 = 28.
12. Find the missing number in the sequence: 1, 8, ____, 22, 29.
15The sequence increases by 7 each step: 8 + 7 = 15.
12 questions · Seed 88 · 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, 24, ____, 40, 48.
2. Find the missing number in the sequence: 18, 22, ____, 30, 34.
3. Find the missing number in the sequence: 19, 27, ____, 43, 51.
4. Find the missing number in the sequence: 4, 8, ____, 16, 20.
5. Find the missing number in the sequence: 12, 18, ____, 30, 36.
6. Find the missing number in the sequence: 13, 20, ____, 34, 41.
7. Find the missing number in the sequence: 12, 15, ____, 21, 24.
8. Find the missing number in the sequence: 1, 7, ____, 19, 25.
9. Find the missing number in the sequence: 20, 23, ____, 29, 32.
10. Find the missing number in the sequence: 9, 17, ____, 33, 41.
11. Find the missing number in the sequence: 12, 20, ____, 36, 44.
12. Find the missing number in the sequence: 1, 8, ____, 22, 29.
12 questions · Seed 88 · 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, 24, ____, 40, 48.
32The sequence increases by 8 each step: 24 + 8 = 32.
2. Find the missing number in the sequence: 18, 22, ____, 30, 34.
26The sequence increases by 4 each step: 22 + 4 = 26.
3. Find the missing number in the sequence: 19, 27, ____, 43, 51.
35The sequence increases by 8 each step: 27 + 8 = 35.
4. Find the missing number in the sequence: 4, 8, ____, 16, 20.
12The sequence increases by 4 each step: 8 + 4 = 12.
5. Find the missing number in the sequence: 12, 18, ____, 30, 36.
24The sequence increases by 6 each step: 18 + 6 = 24.
6. Find the missing number in the sequence: 13, 20, ____, 34, 41.
27The sequence increases by 7 each step: 20 + 7 = 27.
7. Find the missing number in the sequence: 12, 15, ____, 21, 24.
18The sequence increases by 3 each step: 15 + 3 = 18.
8. Find the missing number in the sequence: 1, 7, ____, 19, 25.
13The sequence increases by 6 each step: 7 + 6 = 13.
9. Find the missing number in the sequence: 20, 23, ____, 29, 32.
26The sequence increases by 3 each step: 23 + 3 = 26.
10. Find the missing number in the sequence: 9, 17, ____, 33, 41.
25The sequence increases by 8 each step: 17 + 8 = 25.
11. Find the missing number in the sequence: 12, 20, ____, 36, 44.
28The sequence increases by 8 each step: 20 + 8 = 28.
12. Find the missing number in the sequence: 1, 8, ____, 22, 29.
15The sequence increases by 7 each step: 8 + 7 = 15.
12 questions · Seed 88 · Age guidance, not curriculum certification