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: 73
Explanation Difference between terms: 53 − 43 = 10 63 − 53 = 10 So, the pattern is adding 10 each time . Next number = 63 + 10 = 73 Last updated 05-03-2026
Answer: 5
Explanation Let's analyze the sequence: 15, 14, 12, 9,? The pattern seems to involve subtracting decreasing amounts: 15−1=14 14−2=12 12−3=9 Following this pattern, the next subtraction should be: 9−4=5 Thus, the missing term is 5.
Answer: 9, 9
Explanation 3, 3, 5, 5, 7, 7, 9,9 *** ND11-12-2022
Answer: TUOTUP
Explanation EIGHT: GIEYTH: OUTPUT: TUOTUP ND-21-5-2023
Answer: -77
Explanation We are given an arithmetic progression (AP): 10, 7, 4, ... Step 1: Identify the first term and common difference First term a = 10 Common difference d = 7 - 10 = -3 Step 2: Use the formula for the nth term of an AP: Tₙ = a + (n - 1) × d Find the 30th term (T₃₀): T₃₀ = 10 + (30 - 1) × (-3) T₃₀ = 10 + 29 × (-3) T₃₀ = 10 - 87 = -77
Answer: 65
Explanation 5 → 9 → 17 → 33 → ? → 129 → 257 Step 1: Find the rule Each term follows: Next = ( Previous × 2 ) − 1 Check: 5 times 2 - 1 = 9 5 × 2 − 1 = 9 9 × 2 − 1 = 17 17 × 2 − 1 = 33 Step 2: Find missing term 33 × 2 − 1 = 65
Answer: 16 34
Explanation 10, 44, 12, 40, 14, 38 - 1st number series: 10 → 12 → 14 → ? (increasing by 2) - 2nd number series: 44 → 40 → 38 → ? (decreasing by 4, then 2) So: - Next in first series: 14 + 2 = 16 - Next in second series: 38 - 4 = 34
Answer: 78
Explanation Look at the series and complete it: 72,76,73,77,7, 78 ,.75 **** 72+4= 76 76-3= 73 73+4= 77 77-3= 74 74+4= 78 78-3= 75
Answer: -1
Explanation The series 9, 7, 5, 3, 1 is decreasing by 2 each time: 9 → 7 ( −2 ) 7 → 5 ( −2 ) 5 → 3 ( −2 ) 3 → 1 ( −2 ) Next term: 1 − 2 = −1 So the correct continuation is: 9, 7, 5, 3, 1, −1, −3, …
Answer: 10
Explanation 172 ÷ 5 = 34.4 (approximate, doesn't fit exactly) 172 − 138 = 34 34 + 6 = 40 40 − 22 = 18 Observing the sequence, there may be an alternating pattern of subtraction and addition: 172 - 138 = 34 172 − 138 = 34 34 + 6 = 40 40 − 22 = 18 18 + 2 = 10 18 + 2 = 10
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