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: 1280
Explanation 5 * 1=5 5 * 4=20 20 * 4=80 80 * 4=320 Similarly 320 * 4=1280 and so on.
Answer: 1440
Explanation The series is obtained by multiplying the previous term by a increasing sequence of numbers: 2 × 2 = 4 4 × 3 = 12 12 × 4 = 48 48 × 5 = 240 240 × 6 = 1440
Answer: 43,628
Explanation 135 x 604= 43,056 27 x 698 = 82,926 32 x 864 = 43, 628 ND5-07-2023
Answer: S, Z
Explanation Positions in alphabet: B = 2 D = 4 H = 8 M = 13 Find the pattern of differences: 4 - 2 = 2 8 - 4 = 4 13 - 8 = 5 Differences are: 2, 4, 5 — no obvious sequence, but let's check cumulative sums or pattern in jumps. Try checking the next letter after M (13): If we check the difference increasing by 1 or 2, try next difference as 6 or 7. 13 + 6 = 19 → S 19 + 7 = 26 → Z S (19) and Z (26) are letters. So the next two letters are likely S, Z.
Answer: 98
Explanation Here's the completed series : 2 + 18 = 20 20 + 22 = 42 42 + 26 = 68 68 + 30 = 98 The pattern consists of adding consecutive multiples of 2 (18, 22, 26, 30, ...) to obtain the next term.
Answer: 70
Explanation 100 → 90 (-10) 90 → 80 (-10) 80 → 70 (-10) 70 → 60 (-10) Last verified on 15-02-2026
Answer: 4
Explanation This is a series of perfect squares in decreasing order: - 100 = 10² - 64 = 8² - 36 = 6² - 16 = 4² → Next: 2² = 4
Answer: 12
Explanation The pattern in the series alternates between 3 and a number that increases by 3: 3 | 3 | 3 | 6 | 3 | 9 | 3 | ? The numbers in the positions 2, 4, and 6 (i.e., the non-3 positions) increase by 3: 3 → 6 → 9. Following this, the next non-3 number would logically be 12. Thus, the completed series is: 3 | 3 | 3 | 6 | 3 | 9 | 3 | 12.
Answer: 4.7
Explanation Look at the series 1.5, 2.3, 3.1, and 3.9, 4.7 ** 1.5 +0.8= 2.3 2.3+0.8=3.1 3.1+0.8= 3.9 3.9+0.8= 4.7
Answer: 2
Explanation The sequence divides each term by 3: 486 ÷ 3 = 162 162 ÷ 3 = 54 162 ÷ 3 = 54 54 ÷ 3 = 18 18 ÷ 3 = 6 18 ÷ 3 = 6 6 ÷ 3 = 2
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