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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: 3, 4, ____, 6, 7.
2. Find the missing number in the sequence: 19, 21, ____, 25, 27.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
4. Find the missing number in the sequence: 18, 23, ____, 33, 38.
5. Find the missing number in the sequence: 14, 15, ____, 17, 18.
6. Find the missing number in the sequence: 17, 19, ____, 23, 25.
7. Find the missing number in the sequence: 14, 16, ____, 20, 22.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
9. Find the missing number in the sequence: 11, 16, ____, 26, 31.
10. Find the missing number in the sequence: 5, 6, ____, 8, 9.
11. Find the missing number in the sequence: 2, 4, ____, 8, 10.
12. Find the missing number in the sequence: 3, 8, ____, 18, 23.
12 questions · Seed 104740 · 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: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
2. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
4. Find the missing number in the sequence: 18, 23, ____, 33, 38.
28The sequence increases by 5 each step: 23 + 5 = 28.
5. Find the missing number in the sequence: 14, 15, ____, 17, 18.
16The sequence increases by 1 each step: 15 + 1 = 16.
6. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
7. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18The sequence increases by 2 each step: 16 + 2 = 18.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
9. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
10. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
11. Find the missing number in the sequence: 2, 4, ____, 8, 10.
6The sequence increases by 2 each step: 4 + 2 = 6.
12. Find the missing number in the sequence: 3, 8, ____, 18, 23.
13The sequence increases by 5 each step: 8 + 5 = 13.
12 questions · Seed 104740 · 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: 3, 4, ____, 6, 7.
2. Find the missing number in the sequence: 19, 21, ____, 25, 27.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
4. Find the missing number in the sequence: 18, 23, ____, 33, 38.
5. Find the missing number in the sequence: 14, 15, ____, 17, 18.
6. Find the missing number in the sequence: 17, 19, ____, 23, 25.
7. Find the missing number in the sequence: 14, 16, ____, 20, 22.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
9. Find the missing number in the sequence: 11, 16, ____, 26, 31.
10. Find the missing number in the sequence: 5, 6, ____, 8, 9.
11. Find the missing number in the sequence: 2, 4, ____, 8, 10.
12. Find the missing number in the sequence: 3, 8, ____, 18, 23.
12 questions · Seed 104740 · 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: 3, 4, ____, 6, 7.
5The sequence increases by 1 each step: 4 + 1 = 5.
2. Find the missing number in the sequence: 19, 21, ____, 25, 27.
23The sequence increases by 2 each step: 21 + 2 = 23.
3. Find the missing number in the sequence: 10, 15, ____, 25, 30.
20The sequence increases by 5 each step: 15 + 5 = 20.
4. Find the missing number in the sequence: 18, 23, ____, 33, 38.
28The sequence increases by 5 each step: 23 + 5 = 28.
5. Find the missing number in the sequence: 14, 15, ____, 17, 18.
16The sequence increases by 1 each step: 15 + 1 = 16.
6. Find the missing number in the sequence: 17, 19, ____, 23, 25.
21The sequence increases by 2 each step: 19 + 2 = 21.
7. Find the missing number in the sequence: 14, 16, ____, 20, 22.
18The sequence increases by 2 each step: 16 + 2 = 18.
8. Find the missing number in the sequence: 11, 12, ____, 14, 15.
13The sequence increases by 1 each step: 12 + 1 = 13.
9. Find the missing number in the sequence: 11, 16, ____, 26, 31.
21The sequence increases by 5 each step: 16 + 5 = 21.
10. Find the missing number in the sequence: 5, 6, ____, 8, 9.
7The sequence increases by 1 each step: 6 + 1 = 7.
11. Find the missing number in the sequence: 2, 4, ____, 8, 10.
6The sequence increases by 2 each step: 4 + 2 = 6.
12. Find the missing number in the sequence: 3, 8, ____, 18, 23.
13The sequence increases by 5 each step: 8 + 5 = 13.
12 questions · Seed 104740 · Age guidance, not curriculum certification