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.
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Answer: 80
Explanation 2 + 3 = 5 5 + 7 = 12 12 + 11 = 23 23 + 15 = 38 38 + 19 = 57 57 + 23 = 80 Last verified on 31-03-2026
Answer: 216
Explanation 3 × 2 = 6 6 × 3 = 18 18 × 2 = 36 36 × 3 = 108 108 × 2 = 216 216 × 3 = 648 648 × 2 = 1296
Answer: 9
Explanation The correct sequence should be: 5, 16, 6, 16, 7, 16, 8. The pattern is an increase of 1 in the non-16 numbers. The correct next number after 7 should be 8, not 9. Therefore, the wrong number in the sequence is: 9
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Answer: 6
Explanation What is the missing number? a triangle is a three-sided polygon that consists of three edges and three vertices. The rectangle is a quadrilateral shape ( 4-sided shape ) In geometry, a hexagon is a six-sided polygon ND-6-09-2023
Answer: 2550
Explanation Integer means o and all the following number Negative Number = -1, -2, -3 Positive Number = 1,2, 3, 4 summation of the first 50 even positive integers is 2550
Answer: 900
Explanation In this type of question, We need to find out the LCM of the given numbers. LCM of 12, 15, 18 and 20; 12=2×2×3;15=3×5;18=2×3×3;20=2×2×5; Hence, LCM = 2×2×3×5×3 Since, the soldiers are in the form of a solid square. Hence, LCM must be a perfect square. To make the LCM a perfect square, We have to multiply it by 5, hence, The required number of soldiers = 2×2×3×3×5×5 = 900
Answer: 30
Explanation 1 x 1 + 1 = 2 2 x 2 + 2 = 6 3 x 3 + 3 = 12 4 x 4 + 4 = 20 5 x 5 + 5 = 30 6 x 6 + 6 = 42
Answer: R
Explanation Q U Q!= R *** Q= rational no. s Q! = everything except it in the set here we take it as irrational no. s rational no. s + irrational no. s = real no. s so the answer is R *** additional information: ? The letters R, Q, N, and Z refer to a set of numbers such that: R = real numbers include all real numbers [-inf, inf] Q= rational numbers ( numbers written as ratio) N = Natural numbers (all positive integers starting from 1. (1,2,3....inf) z = integers ( all integers positive and negative ( -inf, ..., -2,-1,0,1,2....inf)
Answer: 19
Explanation Series: 8, 13, 10, 15, 12, 17, 14, ? Let’s break it into two alternating patterns: - 1st, 3rd, 5th, 7th terms: 8, 10, 12, 14 → increasing by 2 - 2nd, 4th, 6th terms: 13, 15, 17 → increasing by 2 So next (8th) number continues the second pattern: 17 + 2 = 19
Answer: W
Explanation We have pairs of letters : AA (A repeated twice) — Z BB (B repeated twice) — Y CC (C repeated twice) — X D _ It seems like: First letter is moving forward: A → B → C → D Second letter is moving backward from Z: Z → Y → X → W So afte r D , we should have W .
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