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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: 17, 22, ____, 32, 37.
2. Find the missing number in the sequence: 18, 19, ____, 21, 22.
3. Find the missing number in the sequence: 16, 17, ____, 19, 20.
4. Find the missing number in the sequence: 18, 20, ____, 24, 26.
5. Find the missing number in the sequence: 15, 17, ____, 21, 23.
6. Find the missing number in the sequence: 12, 13, ____, 15, 16.
7. Find the missing number in the sequence: 3, 4, ____, 6, 7.
8. Find the missing number in the sequence: 16, 18, ____, 22, 24.
9. Find the missing number in the sequence: 14, 15, ____, 17, 18.
10. Find the missing number in the sequence: 19, 20, ____, 22, 23.
11. Find the missing number in the sequence: 4, 6, ____, 10, 12.
12. Find the missing number in the sequence: 1, 2, ____, 4, 5.
12 questions · Seed 93 · 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: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
2. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20The sequence increases by 1 each step: 19 + 1 = 20.
3. Find the missing number in the sequence: 16, 17, ____, 19, 20.
18The sequence increases by 1 each step: 17 + 1 = 18.
4. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
5. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
6. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14The sequence increases by 1 each step: 13 + 1 = 14.
7. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
8. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
9. Find the missing number in the sequence: 14, 15, ____, 17, 18.
16The sequence increases by 1 each step: 15 + 1 = 16.
10. Find the missing number in the sequence: 19, 20, ____, 22, 23.
21The sequence increases by 1 each step: 20 + 1 = 21.
11. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
12. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3The sequence increases by 1 each step: 2 + 1 = 3.
12 questions · Seed 93 · 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: 17, 22, ____, 32, 37.
2. Find the missing number in the sequence: 18, 19, ____, 21, 22.
3. Find the missing number in the sequence: 16, 17, ____, 19, 20.
4. Find the missing number in the sequence: 18, 20, ____, 24, 26.
5. Find the missing number in the sequence: 15, 17, ____, 21, 23.
6. Find the missing number in the sequence: 12, 13, ____, 15, 16.
7. Find the missing number in the sequence: 3, 4, ____, 6, 7.
8. Find the missing number in the sequence: 16, 18, ____, 22, 24.
9. Find the missing number in the sequence: 14, 15, ____, 17, 18.
10. Find the missing number in the sequence: 19, 20, ____, 22, 23.
11. Find the missing number in the sequence: 4, 6, ____, 10, 12.
12. Find the missing number in the sequence: 1, 2, ____, 4, 5.
12 questions · Seed 93 · 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: 17, 22, ____, 32, 37.
27The sequence increases by 5 each step: 22 + 5 = 27.
2. Find the missing number in the sequence: 18, 19, ____, 21, 22.
20The sequence increases by 1 each step: 19 + 1 = 20.
3. Find the missing number in the sequence: 16, 17, ____, 19, 20.
18The sequence increases by 1 each step: 17 + 1 = 18.
4. Find the missing number in the sequence: 18, 20, ____, 24, 26.
22The sequence increases by 2 each step: 20 + 2 = 22.
5. Find the missing number in the sequence: 15, 17, ____, 21, 23.
19The sequence increases by 2 each step: 17 + 2 = 19.
6. Find the missing number in the sequence: 12, 13, ____, 15, 16.
14The sequence increases by 1 each step: 13 + 1 = 14.
7. Find the missing number in the sequence: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
8. Find the missing number in the sequence: 16, 18, ____, 22, 24.
20The sequence increases by 2 each step: 18 + 2 = 20.
9. Find the missing number in the sequence: 14, 15, ____, 17, 18.
16The sequence increases by 1 each step: 15 + 1 = 16.
10. Find the missing number in the sequence: 19, 20, ____, 22, 23.
21The sequence increases by 1 each step: 20 + 1 = 21.
11. Find the missing number in the sequence: 4, 6, ____, 10, 12.
8The sequence increases by 2 each step: 6 + 2 = 8.
12. Find the missing number in the sequence: 1, 2, ____, 4, 5.
3The sequence increases by 1 each step: 2 + 1 = 3.
12 questions · Seed 93 · Age guidance, not curriculum certification