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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: 9, 14, ____, 24, 29.
2. Find the missing number in the sequence: 14, 19, ____, 29, 34.
3. Find the missing number in the sequence: 13, 14, ____, 16, 17.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
5. Find the missing number in the sequence: 1, 2, ____, 4, 5.
6. Find the missing number in the sequence: 15, 16, ____, 18, 19.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
9. Find the missing number in the sequence: 18, 20, ____, 24, 26.
10. Find the missing number in the sequence: 15, 20, ____, 30, 35.
11. Find the missing number in the sequence: 17, 18, ____, 20, 21.
12. Find the missing number in the sequence: 8, 13, ____, 23, 28.
12 questions · Seed 63 · 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: 9, 14, ____, 24, 29.
19The sequence increases by 5 each step: 14 + 5 = 19.
2. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
3. Find the missing number in the sequence: 13, 14, ____, 16, 17.
15The sequence increases by 1 each step: 14 + 1 = 15.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
5. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3The sequence increases by 1 each step: 2 + 1 = 3.
6. Find the missing number in the sequence: 15, 16, ____, 18, 19.
17The sequence increases by 1 each step: 16 + 1 = 17.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
9. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
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: 17, 18, ____, 20, 21.
19The sequence increases by 1 each step: 18 + 1 = 19.
12. Find the missing number in the sequence: 8, 13, ____, 23, 28.
18The sequence increases by 5 each step: 13 + 5 = 18.
12 questions · Seed 63 · 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: 9, 14, ____, 24, 29.
2. Find the missing number in the sequence: 14, 19, ____, 29, 34.
3. Find the missing number in the sequence: 13, 14, ____, 16, 17.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
5. Find the missing number in the sequence: 1, 2, ____, 4, 5.
6. Find the missing number in the sequence: 15, 16, ____, 18, 19.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
9. Find the missing number in the sequence: 18, 20, ____, 24, 26.
10. Find the missing number in the sequence: 15, 20, ____, 30, 35.
11. Find the missing number in the sequence: 17, 18, ____, 20, 21.
12. Find the missing number in the sequence: 8, 13, ____, 23, 28.
12 questions · Seed 63 · 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: 9, 14, ____, 24, 29.
19The sequence increases by 5 each step: 14 + 5 = 19.
2. Find the missing number in the sequence: 14, 19, ____, 29, 34.
24The sequence increases by 5 each step: 19 + 5 = 24.
3. Find the missing number in the sequence: 13, 14, ____, 16, 17.
15The sequence increases by 1 each step: 14 + 1 = 15.
4. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
5. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3The sequence increases by 1 each step: 2 + 1 = 3.
6. Find the missing number in the sequence: 15, 16, ____, 18, 19.
17The sequence increases by 1 each step: 16 + 1 = 17.
7. Find the missing number in the sequence: 13, 18, ____, 28, 33.
23The sequence increases by 5 each step: 18 + 5 = 23.
8. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
9. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
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: 17, 18, ____, 20, 21.
19The sequence increases by 1 each step: 18 + 1 = 19.
12. Find the missing number in the sequence: 8, 13, ____, 23, 28.
18The sequence increases by 5 each step: 13 + 5 = 18.
12 questions · Seed 63 · Age guidance, not curriculum certification