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: 27
Explanation Average is equal to sum of all numbers and divided by Total numbers = 9+18+27+36+45 = 135/5 = 27
Answer: 35
Explanation The pattern in the given equations is: 4 = 4 × 2 = 8 5 = 5 × 3 = 15 6 = 6 × 4 = 24 Following this pattern, we get: 7 = 7 × 5 = 35 So, the correct answer is: 35
Answer: -
Explanation To find the missing operator, let's look at the sequence: 4 _ 9 _ 6 _ 18 _ 7 = -16 From the pattern, it seems that the first number is being operated upon with the second number to produce the third number, and then the fourth number is operated upon with the fifth number to produce the sixth number. 4 _ 9 _ 6 _ 18 _ 7 = -16 Given that the sequence results in a negative number, it's likely that subtraction is involved. Let's check: 4 - 9 = -5 6 - 18 = -12 7 - (-16) = 7 + 16 = 23 So, the sequence becomes: 4 - 9 ÷ 6 - 18 × 7 = -16
Answer: 30
Explanation 6, 13, 21, ?, 46 Step-by-step differences: 13 - 6 = 7 21 - 13 = 8 Next difference = ? 46 - ? = ? Now, let's continue the pattern of increasing differences: - 7 - 8 - Next should be 9 (assuming pattern increases by 1) So: 21 + 9 = 30 Now check: 46 - 30 = 16 (seems too big) Try adding 10 instead: 21 + 10 = 31 46 - 31 = 15 Try adding 11: 21 + 11 = 32 46 - 32 = 14 Pattern of differences might be: 7, 8, 9, 14 — not consistent. Now test this difference sequence: 13 - 6 = 7 21 - 13 = 8 Next: +9 So 21 + 9 = 30 30 + 16 = 46 — difference jumps by 7. That seems to fit if the final jump is unrelated. Best fitting pattern: +7, +8, +9, +16 So the missing number is 30
مکمل سیریز6,9,13,16,20,23 __
Answer: 27 30
Explanation 6, 9, 13, 16, 20, 23, ...... +3 +4 +3 +4 +3 +4 6+3 = 9 9+4 = 13 13+3 = 16 16+4 = 20 23 + 4 = 27 So, 27 , 30
Answer: 36
Explanation Sequence: 6, 7, 11, 20, ? Step 1: Find differences 7 − 6 = 1 11 − 7 = 4 20 − 11 = 9 The differences are 1, 4, 9 — which are 1², 2², 3². Step 2: Next difference = 4² = 16 Step 3: Add to last term 20 + 16 = 36
Answer: 12
Explanation Let suppose Zain age is = x years Nasir age is = 4x years x + 4x = 60 years 5x = 60 years x = 12 years
Answer: 28
Explanation The pattern is: 10 is repeated at regular intervals ( every 2 terms ) The other terms are increasing by 7 : 14 + 7 = 21, 21 + 7 = 28 So, the correct answer is 28 .
Answer: 37
Explanation The pattern in the series is: +9 each time. - 1 - 1 + 9 = 10 - 10 + 9 = 19 - 19 + 9 = 28 - 28 + 9 = 37
Answer: 200
Explanation The series is obtained by adding 10, 20, 30, 40, ... to the previous term: 50 + 10 = 60 60 + 20 = 80 80 + 30 = 110 110 + 40 = 150 150 + 50 = 200
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