Series Completion MCQs - Maths Practice | PakExamPoint

Practise Series Completion MCQs in Maths. Attempt multiple-choice questions, check answers and revise related subtopics.

Series Completion MCQs and revision practice

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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Series Completion: questions and answer review

Try each question before opening its answer. Record the concept behind each mistake and revisit it during your next practice session.

171. If box is coded as CDPQYZ how would you write Coat in Code?

Check answer and explanation

Answer: DEPQBCUV

Explanation Step 1: Analyzing "Box" → "CDPQYZ" The word "Box" has three letters, and "CDPQYZ" has six letters. It seems like each letter is modified and additional letters are added. B → C The letter "B" becomes "C," which is the next letter in the alphabet. O → D The letter "O" becomes "D," which is three letters earlier in the alphabet (O → D). X → P The letter "X" becomes "P," which is eight letters earlier in the alphabet (X → P). The second set of three letters in "CDPQYZ" seems unrelated to the original letters but may follow a consistent rule. Step 2: Applying the same pattern to "Coat" The word "Coat" has four letters, so we apply the same logic for each letter: C → D The letter "C" becomes "D," which is the next letter in the alphabet. O → D The letter "O" becomes "D," which is three letters earlier in the alphabet. A → P The letter "A" becomes "P," which is eight letters earlier in the alphabet. T → Q The letter "T" becomes "Q," which is three letters earlier in the alphabet. For the additional letters (as seen in the second set for "Box"), the pattern appears consistent as "BCUV" for all answers. This sequence is likely fixed. Step 3: Verifying Options By applying the pattern, "Coat" would be coded as DEPQBCUV .

172. complete series: 3, 4, 7, 8, 11, 12. X. ......?

Check answer and explanation

Answer: 15

Explanation The given sequence is: 3, 4, 7, 8, 11, 12 Form differences between two consecutive numbers in the sequence as follows: 4 - 3 = 1 7 - 4 = 3 8 - 7 = 1 11 - 8 = 3 12 - 11 = 1 X- 12 = 3 = 15

173. In the analogy "4 is to 20 as 5 is to ?", what should replace the question mark?

Check answer and explanation

Answer: 30

Explanation The relationship between 4 and 20 is that 20 is 5 times 4. Similarly, to find the number that corresponds to 5 in the same way, multiply 5 by 6: 4×5=20 5×6=30 Thus, 5 is to 30 in the same way that 4 is to 20.

174. Which number replaces question mark in the series 7, 12, 19, ?, 39.

Check answer and explanation

Answer: 28

Explanation Clearly, the given sequence follows the pattern : +5, +7, +9 ... i.e., 7 + 5 = 12, 12 + 7 = 19, ... ∴Missing Number = 19 + 9 = 28. Hence , the answer is 28.

175. what will come next in the series 2.3, 4.5, 6.75, .................?

Check answer and explanation

Answer: 10.125

Explanation Difference 1.5 multiply with next power. 2.3 – 4.5 = 1.5^1 6.75–4.5 = 1.5^2 6.75 + 3.75 = 10.125 Answer is 10.125.

176. We are given a series as 3,3,6,18,72,360,?

Check answer and explanation

Answer: 2040

Explanation We are given a series as 3,3,6,18,72,360,? Now our duty is to find the pattern in the series. Let’s take the first two terms 3 and 3. The only clue we get is that the second term is ×1 of the first term. And also if we add 0 to 3 we get the answer as 3. Now for the next two terms 3 and 6. Now 3×2=6 . So the pattern of the product is fit. Let’s check for the addition. Its 3+3=6 Next are 6 and 18. So 6×3=18 . So the product works. For addition, 6+12=18 But we are not getting any chain or relation between the term for addition so we will drop it here only and will go with the product. Thus, 3×1=3 3×2=6 6×3=18 18×4=72 72×5=360 Now the term that will replace the question mark will be 6 times 360. 360×6=2160 Thus the missing number is 2160. Thus the series is 3,3,6,18, 72,360,2160. So, the correct answer is “2160”.

177. Insert the missing number 9 45 81 8 35 64 10

غائب نمبر 9 45 81 8 35 64 10 داخل کریں۔

Check answer and explanation

Answer: 55 100

Explanation SH19-8-2023

178. 10,11,9,12,8,13,7,14,?,?

Check answer and explanation

Answer: 6, 15

Explanation 10+1=11 11-2=9 9+3=12 12-4=8 8+5=13 13-6=7 7+7=14 14-8=6 6+9= 15 .

179. Find the odd one in the series: 2, 5, 10, 17, 26, 37, 50, 64

Check answer and explanation

Answer: 64

Explanation The pattern in the series is obtained by adding 1 to the square of consecutive integers: (1 × 1) + 1 = 2 (2 × 2) + 1 = 5 (3 × 3) + 1 = 10 (4 × 4) + 1 = 17 (5 × 5) + 1 = 26 (6 × 6) + 1 = 37 (7 × 7) + 1 = 50 (8 × 8) + 1 = 65 ( not 64 ) So, the odd one in the series is: 64 (should be 65) The correct series would be: 2, 5, 10, 17, 26, 37, 50, 65

180. Complete the series: 9P0145, 90159, ?

Check answer and explanation

Answer: 90173

Explanation - First term: 9P0145 → removing 'P' gives 90145 - Second term: 90159 → 90145 + 14 = 90159 - Next: 90159 + 14 = 90173

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