Series Completion MCQs - Maths Practice | PakExamPoint

Practise Series Completion MCQs in Maths. Attempt multiple-choice questions, check answers and revise related subtopics.

Series Completion MCQs and revision practice

Study Series Completion through multiple-choice questions in Maths. This subtopic contains 539 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.

Use these Series Completion MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.

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Series Completion: questions and answer review

Try each question before opening its answer. Record the concept behind each mistake and revisit it during your next practice session.

521. Complete the sequence: CAX, FDY, IGZ, _____.

Check answer and explanation

Answer: LJA

Explanation To complete the sequence CAX, FDY, IGZ, let's analyze the pattern: 1: The first letter of each term: C ( 3rd letter of the alphabet ) F ( 6th letter of the alphabet ) I ( 9th letter of the alphabet) The pattern is an increment of 3 each time. So, 9 + 3 = 12, which corresponds to L. 2:The second letter of each term: A ( 1st letter of the alphabet) D ( 4th letter of the alphabet ) G ( 7th letter of the alphabet) The pattern is an increment of 3 each time. So, 7 + 3 = 10, which corresponds to J. 3: The third letter of each term: X ( 24th letter of the alphabet ) Y ( 25th letter of the alphabet ) Z ( 26th letter of the alphabet ) The pattern is an increment of 1 each time. Following Z, the alphabet wraps around to A. So, the next letter after Z is A. Putting these together , the next term in the sequence is: LJA So, the complete sequence is CAX, FDY, IGZ, and LJA.

522. Complete the series: 2, 5, 9, _____, 20, 27, 35.

Check answer and explanation

Answer: 14

Explanation The pattern in the series is adding 3, 4, 5, and so on: 2 + 3 = 5 5 + 4 = 9 9 + 5 = 14 14 + 6 = 20 20 + 7 = 27 27 + 8 = 35

523. Next in the series: 6, 9, 12, ___?

Check answer and explanation

Answer: 15

Explanation From 6 → 9, we add 3. From 9 → 12, we again add 3. Following the same pattern: 12 + 3 = 15

524. What number will come next? 1, 2, 4, 8, 16, _____?

Check answer and explanation

Answer: 32

Explanation 2 × 2 = 4 4 × 2 = 8 8 × 2 = 16 16 × 2 = 32

525. Which number should come next in this series? 35, 30, 26, 23, 21, _____?

Check answer and explanation

Answer: 20

Explanation Let's find the pattern: 35 - 5 = 30 30 - 4 = 26 26 - 3 = 23 23 - 2 = 21 21 - 1 = 20 The pattern is decreasing by consecutive integers (5, 4, 3, 2, 1).

526. Complete the series: 3, 7, 13, _____, 29.

Check answer and explanation

Answer: 19

Explanation The pattern in the series appears to be an increase of 4, 6, 6, ... . So, the next number in the series would be: 3 + 4 = 7 7 + 6 = 13 13 + 6 = 19 Therefore, the correct answer is: 19

527. 6, 12, 21, ? , 48

Check answer and explanation

Answer: 33

Explanation 6 + 6 = 12 12 + 9 = 21 21 + 12 = 33 33 + 15 = 48

528. Insert the missing number: 12, 21, 23, 32, 34, _____?

Check answer and explanation

Answer: 43

Explanation The pattern of the sequence appears to be an alternating addition of 9 and 2: 12 + 9 = 21 21 + 2 = 23 23 + 9 = 32 32 + 2 = 34 34 + 9 = 43 So, the missing number is: 43

529. What will come next? 19 9 29 8 39?

Check answer and explanation

Answer: 7

Explanation 19 9 29 8 39 7 solution 19 +10= 29 9 -1= 8 29+ 10= 39 8-1= 7

530. What comes next in the sequence: 4, 9, 19, 25?

Check answer and explanation

Answer: 35

Explanation Let's analyze the pattern: From 4 to 9, the difference is +5. From 9 to 19, the difference is +10. From 19 to 25, the difference is +6. The pattern alternates between adding 5 and 10 (or close multiples of 5) . Following this logic: The next number should b e 25 + 10 = 35.

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