ISEE Lower Level Quantitative Reasoning Quiz: Missing Sequence Terms

What this quiz covers

This quiz focuses on Missing Sequence Terms, giving you a quick way to practice the rules, question types, and explanations that matter most for ISEE Lower Level Quantitative Reasoning.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. 19
2. 23 (correct answer)
3. 28
4. 37

Explanation: The rule is to add the two previous numbers to get the next one. The last two numbers given are 9 and 14. To find the next number, add them together: (9 + 14 = 23).

Question 2

1. 27
2. 15 (correct answer)
3. 12
4. 21

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows an alternating pattern: multiply by 2, then subtract 3 (6×2=12, 12-3=9, 9×2=18). The correct answer is 15 because it continues the pattern by subtracting 3 from the previous term (18-3=15). Choice A (27) is incorrect because it fails to apply the pattern consistently and demonstrates a common error of continuing to multiply instead of alternating operations. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences and look for alternating patterns.

Question 3

1. 12
2. 14
3. 13 (correct answer)
4. 11

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 3 to each term. The correct answer is 13 because it continues the pattern of adding 3: 10 + 3 = 13. Choice 12 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding 2 instead of 3. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.

Question 4

1. 22
2. 23 (correct answer)
3. 24
4. 21

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 5 to each term. The correct answer is 23 because it continues the pattern of adding 5: 18 + 5 = 23. Choice 22 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding 4 instead of 5. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.

Question 5

1. 14
2. 15
3. 16 (correct answer)
4. 18

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern where the difference between consecutive terms increases by 1 each time (4-2=2, 7-4=3, 11-7=4). The correct answer is 16 because it continues the pattern by adding 5 to the previous term (11+5=16). Choice A (14) is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding only 3 instead of recognizing the increasing differences. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts to identify changing patterns.

Question 6

1. 22 (correct answer)
2. 16
3. 21
4. 15

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of alternating subtracting 6 and adding 8. The correct answer is 22 because it continues the pattern of adding 8 after subtracting 6: 14 + 8 = 22. Choice 21 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding 7 instead of 8. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 7

1. 18
2. 20 (correct answer)
3. 24
4. 19

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 4 to each term. The correct answer is 20 because it continues the pattern of adding 4: 16 + 4 = 20. Choice 18 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding 2 instead of 4. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.

Question 8

1. 17
2. 13 (correct answer)
3. 12
4. 11

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of alternating adding 5 and subtracting 2. The correct answer is 13 because it continues the pattern of subtracting 2 after adding 5: 15 - 2 = 13. Choice 17 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding 2 instead of subtracting. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 9

1. 36
2. 54 (correct answer)
3. 24
4. 18

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of multiplying by 3 each time. The correct answer is 54 because it continues the pattern of multiplying by 3: 18 × 3 = 54. Choice 36 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of multiplying by 2 instead of 3. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 10

1. 15
2. 20
3. 25 (correct answer)
4. 30

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of alternating between 25 and 20. The correct answer is 25 because it continues the pattern of alternating: after 20 comes 25. Choice 15 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of subtracting further. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.

Question 11

1. 72
2. 48
3. 108 (correct answer)
4. 36

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of multiplying by 3 each time. The correct answer is 108 because it continues the pattern of multiplying by 3: 36 × 3 = 108. Choice 72 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of multiplying by 2 instead of 3. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 12

1. 18
2. 24 (correct answer)
3. 15
4. 12

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of multiplying by 2 each time. The correct answer is 24 because it continues the pattern of multiplying by 2: 12 × 2 = 24. Choice 18 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding instead of multiplying. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 13

1. 30
2. 40 (correct answer)
3. 45
4. 35

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of alternating between 40 and 35. The correct answer is 40 because it continues the pattern of alternating: after 35 comes 40. Choice 45 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding instead of alternating. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 14

1. 30
2. 42
3. 36
4. 48 (correct answer)

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of multiplying by 2 each time. The correct answer is 48 because it continues the pattern of multiplying by 2: 24 × 2 = 48. Choice 42 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding multiples instead of multiplying. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 15

1. 25
2. 23
3. 24 (correct answer)
4. 22

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 3 to each term. The correct answer is 24 because it continues the pattern of adding 3: 21 + 3 = 24. Choice 25 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding 4 instead of 3. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.

Question 16

1. 55
2. 45
3. 50 (correct answer)
4. 60

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 10 to each term. The correct answer is 50 because it continues the pattern of adding 10: 40 + 10 = 50. Choice 55 is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding 15 instead of 10. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.

Question 17

1. 13
2. 14
3. 15 (correct answer)
4. 16

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 3 to each term (6+3=9, 9+3=12, and continuing to 18 requires 15+3=18). The correct answer is 15 because it continues the pattern of adding 3, fitting between 12 and 18 (12+3=15, 15+3=18). Choice B (14) is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding only 2 instead of 3. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 18

1. 24
2. 25 (correct answer)
3. 26
4. 29

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 4 to each term (9+4=13, 13+4=17, 17+4=21). The correct answer is 25 because it continues the pattern of adding 4 to the previous term (21+4=25). Choice A (24) is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding only 3 instead of 4. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.

Question 19

1. 20
2. 24
3. 28
4. 32 (correct answer)

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of doubling each term (4×2=8, 8×2=16). The correct answer is 32 because it continues the pattern of multiplying by 2 (16×2=32). Choice C (28) is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding instead of multiplying. To help students: Practice recognizing arithmetic and geometric patterns. Encourage breaking down sequences into smaller, manageable parts.

Question 20

1. 20
2. 21 (correct answer)
3. 22
4. 17

Explanation: This question tests ISEE Lower Level quantitative reasoning skills: finding a missing term in a sequence. Understanding sequences involves identifying the pattern that determines each term. In this question, the sequence follows a pattern of adding 4 to each term (5+4=9, 9+4=13, 13+4=17). The correct answer is 21 because it continues the pattern of adding 4 to the previous term (17+4=21). Choice A (20) is incorrect because it fails to apply the pattern consistently and demonstrates a common error of adding only 3 instead of 4. To help students: Practice recognizing arithmetic and geometric patterns. Use number lines to visualize basic sequences.