This EduRev document offers 15 Multiple Choice Questions (MCQs) from the topic Number System (Level - 2). These questions are of Level - 2 difficulty and will assist you in the preparation of CAT & other MBA exams. You can practice/attempt these CAT Multiple Choice Questions (MCQs) and check the explanations for a better understanding of the topic.
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the missing number in the following series.
210, 21, 189, ?, 170.1, 17.01
Explanation
The given series follows a pattern as given below:
210 ÷ 10 = 21
21 × 9 = 189
189 ÷ 10 = 18.9
18.9 × 9 = 170.1
170.1 ÷ 10 = 17.01
So, the missing number is 18.9.
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Find the missing term in the following series:
10, 11, 24, 75, 304, ?
Explanation
First term – 10
Second term – 10 × 1 + 1 = 11
Third term – 11 × 2 + 2 = 24
Fourth term – 24 × 3 + 3 = 75
Fourth term – 75 × 4 + 4 = 304
Missing term – 304 × 5 + 5 = 1525
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the wrong term in the following number series.
18, 19.5, 41.5, 128, 513.5, 2588, 15534.5
Explanation
The given series follows the pattern as shown below:
18 x 1 + 1.5 = 19.5
19.5 x 2 + 2.5 = 41.5
41.5 x 3 + 3.5 = 128
128 x 4 + 4.5 = 516.5
516.5 x 5 + 5.5 = 2588
2588 x 6 + 6.5 = 15534.5
Therefore, 513.5 is the wrong term in the series.
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the wrong term in the following series.
11, 45, 215, 1165, 5315, 26565
Explanation
The given series follows a pattern as shown below.
11 x 5 - 10 = 55 - 10 = 45
45 x 5 - 10 = 225 - 10 = 215
215 x 5 - 10 = 1075 - 10 = 1065
1065 x 5 - 10 = 5325 - 10 = 5315
5315 x 5 - 10 = 26575 - 10 = 26565
Therefore, 1165 is the wrong term in the given series.
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the wrong term in the following number series.
54, 68, 85, 106, 134, 164
Explanation
The given series follows the pattern as shown below.
Therefore, 134 is the wrong term in the given series.
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the wrong term in the following series.
8, 15, 41, 169, 841, 5041, 35281
Explanation
The given series follows a pattern as shown below.
8 x 2 - 1 = 16 - 1 = 15
15 x 3 - 2 = 45 - 2 = 43
43 x 4 - 3 = 172 - 3 = 169
169 x 5 - 4 = 845 - 4 = 841
841 x 6 - 5 = 5046 - 5 = 5041
5041 x 7 - 6 = 35287 - 6 = 35281
So, the wrong term in the given series is 41.
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:What should come in place of the question mark in the following number series?
1, 4, 27, 16, 125, 36, ?
Explanation
The pattern is as follows.
13 = 1
22 = 4
33 = 27
42 = 16
53 = 125
62 = 36
73 = 343
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:What should come in place of the question mark in the following number series?
4, 8, 6, 18, 10, 50, ?, 98
Explanation
The given series is an alternate series. Odd series is double of consecutive prime numbers.
i.e.
2 × 2 = 4
3 × 2 = 6
5 × 2 = 10
7 × 2 = 14
Even series is as:
42/2 = 8
62/2 = 18
102/2 = 50
142/2 = 98
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Select the number that will come in place of the question mark (?) in the following series.
18, 23, 38, 83, 218, ?
Explanation
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Find the missing term in the following series:
2, 5, 14, 41, 122, ?
Explanation
Here, the pattern is addition of powers of 3 to the previous terms to get the next term.
First term – 2
Second term – 2 + 3 = 5
Third term – 5 + 9 = 14
Fourth term – 14 + 27 = 41
Fifth term – 41 + 81 = 122
Missing term – 122 + 243 = 365
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Find the missing term in the following series:
15, 19, 28, 44, 69, ?
Explanation
First term – 15
Second term – 15 + 22 = 19
Third term – 19 + 32 = 28
Fourth term – 28 + 42 = 44
Fifth term – 44 + 52 = 69
Missing term – 69 + 62 = 105
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Find the missing term in the following series.
6, 17, 39, 83, 171, ?
Explanation
First term – 6
Second term – 6 × 2 + 5 = 17
Third term – 17 × 2 + 5 = 39
Fourth term – 39 × 2 + 5 = 83
Fifth term – 83 × 2 + 5 = 171
Missing term – 171 × 2 + 5 = 347
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the odd one out number in the series.
7, 60, 325, 1640, 8275
Explanation
Series is as follows.
(7 + 5) × 5 = 60,
(60 + 5) × 5 = 325,
(325 + 5) × 5 = 1650,
(1650 + 5) × 5 = 8275
Therefore, option (3) is the correct answer.
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the odd one out number in the series.
323, 221, 143, 79, 35, 15
Explanation
Series is as follows.
19 × 17,
17 × 13,
13 × 11,
11 × 7,
7 × 5,
5 × 3
Multiplication of prime numbers is done in decreasing order.
Therefore, option (1) is the correct answer.
Report a problem
Question for Practice Questions Level 2: Number Series
Try yourself:Directions: Find the wrong term in the following series.
7, 28, 63, 124, 215, 342, 511
Explanation
23 - 1 = 7
33 - 1 = 26 (Not 28)
43 - 1 = 63
53 - 1 = 124
63 - 1 = 215
73 - 1 = 342
83 - 1 = 511
Hence, 28 is a wrong number. The correct number is 26.
Report a problem