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CAT Exam  >  CAT Test  >  Level-wise Tests  >  Test Level 1: Series - CAT MCQ

Test Level 1: Series CAT MCQs & solutions - Free


MCQ Practice Test & Solutions: Test Level 1: Series (15 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 1: Series". These 15 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: 30 minutes
  • - Number of Questions: 15

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Test Level 1: Series - Question 1
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Directions: Find the missing term in the following number series.
9, 12, 10, ?, 12, 21, 15, 27

Detailed Solution: Question 1

In this series, addition and subtraction take place alternately. Successive multiples of 3 are being added, and successive multiples of 2 are being subtracted.
9 + 3 = 12
12 - 2 = 10
10 + 6 = 16
16 - 4 = 12
12 + 9 = 21
21 - 6 = 15
15 + 12 = 27
Thus, the missing number is 16.

Test Level 1: Series - Question 2
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Directions: Find the missing term in the following number series.
4, 5, 9, 29, 111, 556, 3335

Detailed Solution: Question 2

The number series follows the rule as mentioned below:

Hence, 29 is the wrong number.

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Test Level 1: Series - Question 3
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Directions: Find the missing term in the following number series.
450, 350, 230, ?, 10, -50

Detailed Solution: Question 3

The series follows the pattern:
450 - (2 × 50) = 350
350 - (3 × 40) = 230
230 - (4 × 30) = 110
110 - (5 × 20) = 10
10 - (6 × 10) = -50
Thus, the missing number is 110.

Test Level 1: Series - Question 4
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Directions: Find the missing term in the following number series.
7, 25, 45, 67, 91, ?

Detailed Solution: Question 4

Given series follows the pattern as mentioned below.
7 + 18 = 25
25 + 20 = 45
45 + 22 = 67
67 + 24 = 91
91 + 26 = 117

Test Level 1: Series - Question 5
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What should come in place of question mark (?) in the following number series?
325, 316, 298, 271, ?, 190

Detailed Solution: Question 5

Given numbers follow this pattern.
325 - 9 = 316
316 - 18 = 298
298 - 27 = 271
271 - 36 = 235
235 - 45 = 190

Test Level 1: Series - Question 6
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What will come in the place of question mark in the following number series?
4, 14, ?, 214, 854, 3414

Detailed Solution: Question 6

The pattern followed is that the numbers are initially being multiplied by 4 and then, the product is subtracted by 2 to get the following numbers by following the same pattern.
(4 × 4) - 2 = 14
(14 × 4) - 2 = 54 
(54 × 4) - 2 = 214
(214 × 4) - 2 = 854
(854 × 4) - 2 = 3414
Thus, missing term is 54.

Test Level 1: Series - Question 7
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What will come in the place of question mark in the following number series?
85, 89, 86, 94, ?, 100, 91, 107, 95

Detailed Solution: Question 7

In the following series, the multiples of 4 are added at odd places and multiples of 3 are subtracted at even places.
85 + 4 = 89
89 - 3 = 86
86 + 8 = 94
94 - 6 = 88
88 + 12 = 100
100 - 9 = 91
91 + 16 = 107
107 - 12 = 95
Thus, missing term is 88.

Test Level 1: Series - Question 8
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What will come in the place of question mark in the following number series?
233, 232, 224, 197, 133, ?

Detailed Solution: Question 8

The pattern is as follows.
233 - 13 = 233 - 1 = 232,
232 - 23 = 232 - 8 = 224,
224 - 33 = 224 - 27 = 197,
197 - 43 = 197 - 64 = 133,
133 - 53 = 133 - 125 = 8 
Therefore, missing term is 8.

Test Level 1: Series - Question 9
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Which of the following will take the place of '?' in the following series?
16, 24, ?, 37, 42, 46, 49

Detailed Solution: Question 9

The series follows the following pattern. 
16 + 8 = 24
24 + 7 = 31
31 + 6 = 37
37 + 5 = 42
42 + 4 = 46
46 + 3 = 49
The missing number is 31.

Test Level 1: Series - Question 10
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Find the missing term and complete the sequence.
4, 7, ?, 19, 28, 39

Detailed Solution: Question 10

The pattern here is as follows.
(1)2 + 3 = 4
(2)2 + 3 = 7
(3)2 + 3 = 12 (Answer) 
(4)2 + 3 = 19
(5)2 + 3 = 28
(6)2 + 3 = 39
So, missing number is 12.

Test Level 1: Series - Question 11
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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.
__ a __ b __ abaa __ bab __ abba

Detailed Solution: Question 11

The series is baa/bba/baa/bba/baa/bba. Thus, the pattern 'baa/bba' is repeated.

Test Level 1: Series - Question 12
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Find the missing terms and complete the sequence.
106, 106, 80, 80, 54, 54, ?, ?

Detailed Solution: Question 12

In this series, each number is repeated, then 26 is subtracted to arrive at the next number.
i.e. 106 - 26 = 80
80 - 26 = 54
Therefore,
? = 54 - 26 = 28
This is the correct answer.

Test Level 1: Series - Question 13
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What should come in place of the question mark (?) in the following number series?
42, 57, 87, 132, 192, ?

Detailed Solution: Question 13

42, 57, 87, 132, 192, ?
From the given sequence, we notice that
42 + 15 = 57
57 + 30 = 87
87 + 45 = 132
132 + 60 = 192
192 + 75 = 267

Test Level 1: Series - Question 14
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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.
__ bc __ ca __ aba __ c __ ca

Detailed Solution: Question 14

The series is abc/bca/cab/abc/bca. Thus, the letters change places in a cyclic order.

Test Level 1: Series - Question 15
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Directions: Find the wrong term.
2, 11.6, 39.8, 206.6, 1231, 8407.4

Detailed Solution: Question 15

The pattern is: 
11.6 = 2 × 3 + 5.6
39.8 = 11.6 × 4 - 6.6
206.6 = 39.8 × 5 + 7.6 
1231 = 206.6 × 6 - 8.6
8626.6 = 1231 × 7 + 9.6
So, 8407.4 is the incorrect term.

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About this CAT Practice Test

This test contains 15 MCQs on Test Level 1: Series with detailed solutions for each question. It is part of the Level-wise Tests for CAT course on EduRev, designed to align with the current CAT syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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