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Test Level 2: Series CAT MCQs & solutions - Free


MCQ Practice Test & Solutions: Test Level 2: Series (20 Questions)

You can prepare effectively for CAT Level-wise Tests for CAT with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test Level 2: Series". These 20 questions have been designed by the experts with the latest curriculum of CAT 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 40 minutes
  • - Number of Questions: 20

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Test Level 2: Series - Question 1

Directions: In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
ba __ cb __ b __ bab__

Detailed Solution: Question 1

The series is babc/babc/babc. Thus, the pattern 'babc' is repeated.

Test Level 2: Series - Question 2

Directions: In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
m __ nm __ n __ an __ a __ ma __

Detailed Solution: Question 2

The series is man/man/man/man/man. Thus, the pattern 'man' is repeated.

Test Level 2: Series - Question 3

Directions: In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
ab __ __ baa __ __ ab __

Detailed Solution: Question 3

The series is aba/aba/aba/aba. Thus, the pattern 'aba' is repeated.

Test Level 2: Series - Question 4

Directions: Find the missing term in the following number series.
0.5, 3, 15, 72, ?, 2310

Detailed Solution: Question 4

In this series, each term first undergoes addition (with 1, 2, 3 and so on), followed by multiplication of the result (by 2, 3, 4, 5 and so on).
(0.5 + 1) × 2 = 3
(3 + 2) × 3 = 15
(15 + 3) × 4 = 72
(72 + 4) × 5 = 380
(380 + 5) × 6 = 2310
Thus, 380 is the missing number.

Test Level 2: Series - Question 5

Directions: Study the information below and answer the question that follows.
In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below. Choose the correct alternative.
__ aa __ ba __ bb __ ab __ aab

Detailed Solution: Question 5

The series is baab/baab/baab/baab. Thus, the pattern `baab` is repeated.

Test Level 2: Series - Question 6

What should come in place of question mark in the following number series?
3.5, 14.5, 36.5, 69.5, ?, 168.5

Detailed Solution: Question 6

The numbers follow this pattern.
3.5 + 11 × 1 = 14.5
14.5 + 11 × 2 = 36.5
36.5 + 11 × 3 = 69.5
69.5 + 11 × 4 = 113.5
113.5 + 11 × 5 = 168.5

Test Level 2: Series - Question 7

What should come in place of question mark in the following number series?
8, 7, 12, 10, 18, 16, 26, 25, ?

Detailed Solution: Question 7

The given sequence is a combination of two series.
Series I: 8, 12, 18, 26, ?
The pattern I follows: +4, +6, +8, +10
Series II: 7, 10, 16, 25
The pattern II follows: +3, +6, +9
So, missing term = 26 + 10 = 36

Test Level 2: Series - Question 8

What will come in place of the question mark (?) in the following series?
4, 11, 30, 85, 248, ?

Detailed Solution: Question 8

31 + 1 = 4
32 + 2 = 11
33 + 3 = 30
34 + 4 = 85
35 + 5 = 248
36 + 6 = 735

Test Level 2: Series - Question 9

What will come in the place of question mark in the following number series?
587, 443, 343, 279, 243, ?

Detailed Solution: Question 9

The sequence used in the series is following this pattern. 
587 - 122 = 587 - 144 = 443,
443 - 102 = 443 - 100 = 343,
343 - 82 = 343 - 64 = 279,
279 - 62 = 279 - 36 = 243,
243 - 42 = 243 - 16 = 227 
Thus, missing number is 227.

Test Level 2: Series - Question 10

Which of the following will take the place of '?' in the following series?
20, ?, 11, 25, 93, 459

Detailed Solution: Question 10

The series follows the following pattern. 
20 × 1 - 10 = 10
10 × 2 - 9 = 11
11 × 3 - 8 = 25
25 × 4 - 7 = 93
93 × 5 - 6 = 459
Hence, the missing number is 10.

Test Level 2: Series - Question 11

What should come in place of the question mark (?) in the following series?
112, 148, 173, 189, 198, ?, 203

Detailed Solution: Question 11

The series given in this question adds squares starting from 6 and ending at 1.
112 + 62 = 148
148 + 52 = 173
173 + 42 = 189
189 + 32 = 198
198 + 22 = 202
202 + 12 = 203 
Thus, the missing number is 202. 

Test Level 2: Series - Question 12

What should come in place of the question mark (?) in the following series?
17, 25, ?, 38, 43, 47, 50

Detailed Solution: Question 12

The series is following the given pattern. 
17 + 32 - 1 = 25
25 + 32 - 2 = 32
32 + 32 - 3 = 38
38 + 32 - 4 = 43
43 + 32 - 5 = 47
47 + 32 - 6 = 50
Thus, the missing number is 32.

Test Level 2: Series - Question 13

Find the wrong number in the following number series.
7, 9, 11, 15, 21, 35

Detailed Solution: Question 13

The pattern is:
11 = 9 + 7 - 5
15 = 11 + 9 - 5
21 = 11 + 15 - 5
35 ≠ 15 + 21 - 5
So, 35 is the wrong term. It should be 31.

Test Level 2: Series - Question 14

Find the wrong number in the following number series.
1050, 510, 242, 106, 46, 16, 3

Detailed Solution: Question 14

The pattern is:
1050 ÷ 2 - 15 = 510
510 ÷ 2 - 13 = 242
242 ÷ 2 - 11 = 110
110 ÷ 2 - 9 = 46
46 ÷ 2 - 7 = 16
16 ÷ 2 - 5 = 3
Hence, the wrong term is 106.

Test Level 2: Series - Question 15

What should come in place of the question mark (?) in the following series?
8, 4, 4, 6, 12, ?

Detailed Solution: Question 15

The series is in the following pattern.
8 × 0.5 = 4
4 × 1 = 4
4 × 1.5 = 6
6 × 2 = 12
12 × 2.5 = 30

Test Level 2: Series - Question 16

Find the missing term and complete the sequence.
17, 35, 106, 425, ?, 12757

Detailed Solution: Question 16


Thus, ? = 2126

Test Level 2: Series - Question 17

Find the missing term and complete the sequence.
315, 313, 312, 316, 310, 319, ?

Detailed Solution: Question 17


So, ? = 309

Test Level 2: Series - Question 18

Find the missing term and complete the sequence.
25, 31, 43, ?, 115, 211

Detailed Solution: Question 18


So, ? = 67

Test Level 2: Series - Question 19

What should come in place of the question mark (?) in the following number series?
13, 24, 92, 546, ?

Detailed Solution: Question 19

The required sequence is:
13 × 2 - 2 = 24
24 × 4 - 4 = 92
92 × 6 - 6 = 546
546 × 8 - 8 = 4360
Hence, the missing term is 4360.

Test Level 2: Series - Question 20

Directions: Study the information below and answer the question that follows.
In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below. Choose the correct alternative.
bca __ b __ aabc __ a __ caa

Detailed Solution: Question 20

The series is bcaa/bcaa/bcaa/bcaa. Thus, the pattern `bcaa` is repeated.

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