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: 135
Explanation Given series: 15, 45, ?, 405 Let's find the pattern: 15 × 3 = 45 45 × 3 = 135 135 × 3 = 405 The pattern is obtained by multiplying the previous term by 3 .
Answer: 4
Explanation The sequence follows a pattern of dividing by 2 : 64 ÷ 2 = 32 32 ÷ 2 = 16 16 ÷ 2 = 8 8 ÷ 2 = 4 This is a geometric sequence with a common ratio of ½ .
Answer: 5%
Explanation Marked Price of Car = 6,00000 Sale Price of Car = 5,70000 Discount = 6,00000 — 5,70000 = 30,000 Discount Percentage = 30,000/6,00000 × 100 Discount Percentage = 0.05×100 = 5%
Answer: 42
Explanation The Catalan numbers: 1, 2, 5, 14, 42, 132,
باقیوں سے مختلف؟ 3، 7، 11، 14، 17، 21
Answer: 14
Explanation Each of the numbers except 14 is an odd number. The number ' 14 ' is the only EVEN number
Answer: 30
Explanation In this series, each number is formed by adding the square of a natural number (1^2, 2^2, 3^2, .....) to the preceding number. 15 + 1² = 16 16 + 2² = 20 20 + 3² = 29 ← should be 29, but given 30 29 + 4² = 45 45 + 5² = 70 So the correct sequence should be: 15, 16, 20, 29, 45, 70 Therefore, 30 is the incorrect number **** Last updated by NS on 01 MAY 2026
Answer: 13
Explanation What is the missing number in the sequence? 1, 1, 2, 3, 5, 8, ? 1 + 1 = 2 1+2 = 3 2+3 = 5 8+5=13
Answer: 64
Explanation The given series is a square of natural number (1)^2 = 1 (2)^2 = 4 (3)^2 =9 (4)^2 = 16 (5)^2 = 25 (6)^2 = 36 (7)^2 = 42 (8)^2 = 64
Answer: 12
Explanation HCF Stand for Highest Common factor So the HCF of 60 and 72 is 2 × 2 × 3 which is 12. .......... T he lowest common multiple is found by multiplying all the factors which appear in either list ........... So the LCM of 60 and 72 is 2 × 2 × 2 × 3 × 3 × 5 which is 360. SH5-9-2023
Answer: 19
Explanation The pattern alternates between +4 and +1 : 4 + 4 = 8 8 + 1 = 9 9 + 4 = 13 13 + 1 = 14 14 + 4 = 18 18 + 1 = 19 The missing number is 19 .
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