Complete the Series MCQ Quiz - Objective Question with Answer for Complete the Series - Download Free PDF

Last updated on Jul 9, 2025

The Complete the Series question answers can be tricky to solve, but with practice attempting the Logical Reasoning section can get easier. Testbook presents Complete the Series quiz for exams like SBI PO, SSC CGL, RRB JE and GATE. Attempt Complete the Series objective questions to ace this topic and practice on similar topics like inequality, puzzles, linear arrangements and number series. Save the Complete the Series MCQs if you feel the need to revisit. With the solutions and explanations of these questions, you can save time and improve accuracy during the exam.

Latest Complete the Series MCQ Objective Questions

Complete the Series Question 1:

Select the number from among the given options that can replace the question mark (?) in the following series.
62 61.1 60.2 59.3 58.4 57.5 ?

  1. 56.4
  2.  56.6
  3. 56.8
  4.  56.2

Answer (Detailed Solution Below)

Option 2 :  56.6

Complete the Series Question 1 Detailed Solution

The logic followed here is,

Hence, the correct answer is "Option 2".

Complete the Series Question 2:

What should come in place of the question mark (?) in the given series?
1001 1000 997 992 985 ?

  1. 976
  2. 978
  3.  975
  4. 977

Answer (Detailed Solution Below)

Option 1 : 976

Complete the Series Question 2 Detailed Solution

The logic followed here is,

Hence, the correct answer is "Option 1".

Complete the Series Question 3:

Select the number from among the given options that can replace the question mark (?) in the following series.
37 55 66 84 95 113 ?

  1. 145
  2. 124
  3. 166
  4. 131

Answer (Detailed Solution Below)

Option 2 : 124

Complete the Series Question 3 Detailed Solution

The logic followed here is:

Hence, the correct answer is "Option 2".

Complete the Series Question 4:

What should come in place of the question mark (?) in the given series?
 701 700 697 692 685 ?

  1. 676
  2. 673
  3. 675
  4. 671

Answer (Detailed Solution Below)

Option 1 : 676

Complete the Series Question 4 Detailed Solution

The logic followed here is:

                                                                                                                                                                                        

701 700 697 692 685 676
  -1 -3 -5 -7 -9  
    -2   -2   -2   -2    

Thus, the missing term in the series is 676.

Hence, the correct answer is "Option 1";

Complete the Series Question 5:

Select the number from among the given options that can replace the question mark (?) in the following series.
105 97 89 81 73 ?

  1. 60
  2. 58
  3. 65
  4. 70

Answer (Detailed Solution Below)

Option 3 : 65

Complete the Series Question 5 Detailed Solution

The logic followed here is:

105 97 89 81 73 65
  -8   -8   -8   -8   -8  

 

Thus, the missing term in the series is 65.

Hence, the correct answer is "Option 3";

Top Complete the Series MCQ Objective Questions

Which of the following numbers will replace the question mark (?) in the given series?

13, 14, 23, 48, 97, 178, ?

  1. 259
  2. 278
  3. 269
  4. 299

Answer (Detailed Solution Below)

Option 4 : 299

Complete the Series Question 6 Detailed Solution

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The logic followed here is: 

Addition of the square of the odd number to previous number to get next number in the series.

13 + 12 =13 + 1 = 14

14 + 32 = 14 + 9 = 23

23 + 52 = 23 + 25 = 48 

48 + 72 = 48 + 49 = 97 

97 + 92 = 97 + 81 = 178

178 + 112 = 178 + 121 = 299 

Hence, the correct option is 299

Find the missing number in the given series following the same pattern.

18, 24, 84, 294, 798, (?)

  1. 1682
  2. 1788
  3. 1867
  4. 1932

Answer (Detailed Solution Below)

Option 2 : 1788

Complete the Series Question 7 Detailed Solution

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The logic follows here:

Hence, the correct answer is "1788".

Select the number from among the given options that can replace the question mark (?) in the following series.

4, 5, 18, 19, 68, 69, ?

  1. 256
  2. 250
  3. 262
  4. 266

Answer (Detailed Solution Below)

Option 3 : 262

Complete the Series Question 8 Detailed Solution

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The number from among the given options that can replace the question mark (?) in the following series is as shown below :-

Hence, the correct answer is "262".

Alternate Method 
Hence, the correct answer is "262".

Select the number from among the given options that can replace the question mark (?) in the following series.

11, 13, 19, 49, 109, 239, ?

  1. 449
  2. 394
  3. 349
  4. 494

Answer (Detailed Solution Below)

Option 1 : 449

Complete the Series Question 9 Detailed Solution

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Can you solve this number series puzzle? 11, 13, 19, 49, 109, 239, ? – Find the logic and the missing number with a simple and clear explanation

The pattern followed here is:

Hence, 449 is the correct answer.

Which of the following numbers will replace the question mark (?) in the given series?

6, 16, 29, 62, 121, ?

  1. 283
  2. 246
  3. 238
  4. 264

Answer (Detailed Solution Below)

Option 2 : 246

Complete the Series Question 10 Detailed Solution

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The pattern followed here is:

6 × 2  + 4 = 16

16 × 2 - 3 = 29

29 × 2 + 4 = 62

62 × 2 - 3 = 121 

121 × 2 + 4 = 246

Hence, the correct answer is "246".

Select the number from among the given options that can replace the question mark (?) in the following series

10, 22, 35, 40, 72, 40, ?

  1. 134
  2. 143
  3. 131
  4. 133

Answer (Detailed Solution Below)

Option 4 : 133

Complete the Series Question 11 Detailed Solution

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The logic follows here is:

Hence, the correct answer is "133".

Select the number from among the given options that can replace the question mark (?) in the following series.

5, 18, 70, 278, ?

  1. 328
  2. 298
  3. 592
  4. 1110 

Answer (Detailed Solution Below)

Option 4 : 1110 

Complete the Series Question 12 Detailed Solution

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The pattern followed here is:

(Previous number × 3) + (previous number – 2) = next number

Given: 5, 18, 70, 278, ?

1st number → 5

2nd number → (5 × 3) + (5 - 2) = 15 + 3 = 18

3rd number → (18 × 3) + (18 - 2) = 54 + 16 = 70

4th number → (70 × 3) + (70 - 2) = 210 + 68 = 278

5th number (278 × 3) + (278 - 2) = 834 + 276 = 1110

Hence, ''1110" is the correct answer.

Alternate MethodThe logic followed here is:

The Previous number × 4 - 2 = next number.

5, 18, 70, 278, ?

5 × 4 - 2 = 18

18 × 4 - 2 = 70

70 × 4 - 2 = 278

278 × 4 - 2 = 1110

Hence, the correct answer is "1110".

Select the number from among the given options that can replace the question mark (?) in the following series.

2, 4, 5, 19, 71, ?

  1. 361
  2. 216
  3. 316
  4. 261

Answer (Detailed Solution Below)

Option 1 : 361

Complete the Series Question 13 Detailed Solution

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The logic is:

× 1 + 2 = 2 + 2 = 4

4 × 2 - 3 = 8 - 3 = 5

× 3 + 4 = 15 + 4 = 19

19 × 4 - 5 = 76 - 5 = 71

71 × 5 + 6 = 355 + 6 = 361

Hence, ‘361’ is the correct answer.

Select the number from among the given options that can replace the question mark (?) in the following series.

56, 56, 54, 162, 158, ?

  1. 790
  2. 830
  3. 456
  4. 268

Answer (Detailed Solution Below)

Option 1 : 790

Complete the Series Question 14 Detailed Solution

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Given: 56, 56, 54, 162, 158, ?

Logic: 

Hence, 790 is the correct answer.

Which of the following numbers will replace the question mark (?) in the given series?

7, 7, 9, 27, 31, 155, ?

  1. 166
  2. 183
  3. 161
  4. 181

Answer (Detailed Solution Below)

Option 3 : 161

Complete the Series Question 15 Detailed Solution

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The logic followed here is:

Hence, option 3) is the correct answer.

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