Practise Series Completion MCQs in Maths. Attempt multiple-choice questions, check answers and revise related subtopics.
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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Answer: EFGH
Explanation The sequence is sliding groups of four consecutive letters of the alphabet: ABCD → BCDE → CDEF → DEFG → EFGH (“BCDF” in the list looks like a typo for BCDE.)
Answer: 129
Explanation Here are odd numbers 101, 103, 105 , 107, 109, 111 , 113, 115, 117, 119 , 121, 123, 125, 127, 129 one digit is missing in the first two series 101 and 105 then two digits are missing in the next two series 105 and 111 then three digits are missing in the next two series 111 and 119 then obviously, next digit in the series comes after 4 digits ( 119 , 121, 123, 125, 127, 129)
Answer: 120
Explanation 1*5 = 5 5*4 = 20 20*3 = 60 60*2 = 120 120*1 = 120
Answer: 50
Explanation Pattern: 2 = 1² + 1 8 = 2² + 4 18 = 3² + 9 32 = 4² + 16 Next = 5² + 25 = 50
Answer: 30
Explanation 6 + 6 = 12 12 + 6 = 18 18 + 6 = 24 So every number is increased by 6 to get the next number. The next number is 24 + 6 = 30 ND23-9-2023
Answer: 17
Explanation This is a product of fractions: (4/3)(5/4)(6/5)...(51/50) All middle terms cancel: Only 51/3 = 17 This product simplifies to 17 when all terms from 1/3 to 1/50 are multiplied as shown.
Answer: 16
Explanation Given the series is: 1, 2, 2, 4, 4, 6, 8, 8, 16 Let's break it down: Powers of 2 are interspersed with repetitions: 1 (2^0), 2 (2^1), 2, 4 (2^2), 4, 8 (2^3), 8, 16 (2^4) If the pattern continues with repetitions after powers of 2: The next number would logically be 16 (a repetition of the last number, 16).
Answer: 10, 10
Explanation Looking at the pattern: 20 → 20 (no change) 20 → 19 (decrease by 1) 19 → 16 (decrease by 3) 16 → 17 (increase by 1) 17 → 13 (decrease by 4) 13 → 14 (increase by 1) 14 → 11 (decrease by 3) Now, we continue the alternating pattern: 11 → 12 (increase by 1) 12 → 9 (decrease by 3) The next two numbers are 10, 10.
Answer: 40
Explanation 34+5=39 39-2=37 37+5=42 42-2=40 40+5= 45 .
Answer: 14
Explanation The sequence splits into two alternating patterns: 8, 11, 14, 17 (each +3) and 43, 41, 39 (each −2). So the missing term (5th) is 14 .
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