• Number Classification Drill (Part III)
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Number Classification Drill (Part III)

Description: Classification Numbers as Complex, Real, Rational, Integer and Natural Numbers Verbal Reasoning Free Online Practice and Preparation Tests
Number of Questions: 20
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Tags: Number Classification Number Classification Drill Classification Numbers Complex Real Rational Integer Natural Numbers Verbal Reasoning Free Online Practice Number Classification Preparation Number Series, Letter Series Classification Odd one out
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Directions: In the following numbers, one number is wrong. Find out the odd number.

115, 95, 70, 40, 10, - 35, - 80

  1. 95

  2. 10

  3. 40

    • 35
Show answer
Correct Option: B
Explanation:

The differences between the numbers are 20, 25, 30, 35, 40, 45. 115 - 20 = 95; 95 - 25 = 70; 70 - 30= 40; 40 - 35 = 5; 5 - 40 = - 35; - 35 - 45 = - 80. 10 is odd-man

Directions: In the following numbers, one number is wrong. Find out the odd number.

10, 16, 28, 50, 100, 196, 388

  1. 16

  2. 50

  3. 100

  4. 196

  5. 388

Show answer
Correct Option: B
Explanation:

The differences between numbers are 6, 12, 24, 48, 96, 192

10 + 6 = 16; 16 + 12 = 28; 28 + 24 = 52; 52 + 48 = 100; 100 + 96 = 196; 196 + 192 = 3888.  50 is the odd number.

Directions: In the following numbers, one number is wrong. Find out the odd number.

123, 102, 81, 66, 55, 48, 45

  1. 102

  2. 81

  3. 66

  4. 55

  5. 48

Show answer
Correct Option: A
Explanation:

The differences between two consecutive numbers are (23, 19, 15, 11, 7, 3)  123 - 23 = 100; 100 - 19 = 81; 81 - 15 = 66; 66 - 11 = 55; 55 - 7 = 48; 48 - 3 = 45.  102 is odd - man.

Directions: In the following numbers, one number is wrong. Find out the odd number.

51, 50, 47, 44, 35, 26, 15

  1. 50

  2. 47

  3. 44

  4. 35

  5. 26

Show answer
Correct Option: C
Explanation:

The differences between numbers are 1, 3, 5, 7, 9, 11.  51 - 1 = 50; 50 - 3 = 47; 47 - 5 = 42; 42 - 7 = 35; 35 - 9 = 26; 26 - 11= 15.  44 is odd - man.

Directions: In the following numbers, one number is wrong. Find out the odd number.

11, 15, 17, 19, 23, 25

  1. 19

  2. 11

  3. 15

  4. 17

  5. 23

Show answer
Correct Option: C
Explanation:

The differences between numbers are alternately + 2 and + 4. 11 + 2 = 13; 13 + 4 = 17; 17 + 2 = 19; 19 + 4 = 23; 23 + 2 = 25. 15 is the odd one out.

Directions: In the following numbers, one number is wrong. Find out the odd number.

36, 49, 100, 144, 196, 256, 324

  1. 256

  2. 196

  3. 144

  4. 100

  5. 49

Show answer
Correct Option: E
Explanation:

Except 49, all the others are squares of even numbers.

Directions: In the following numbers, one number is wrong. Find out the odd number.

14, 21, 16, 23, 30, 25, 20

  1. 16

  2. 20

  3. 23

  4. 25

  5. 30

Show answer
Correct Option: E
Explanation:

The differences between numbers are alternately + 7 and – 5 14 + 7 = 21; 21 – 5 = 16; 16 + 7 = 23; 23 – 5 = 18; 18 + 7 = 25; 25 – 5 = 20.  The odd number is 30.

Directions: In the following numbers, one number is wrong. Find out the odd number.

72, 126, 135, 144, 198, 362

  1. 362

  2. 126

  3. 72

  4. 198

  5. 144

Show answer
Correct Option: A
Explanation:

Except 362, all others are multiples of 9.

Directions: In the following numbers, one number is wrong. Find out the odd number.

14, 56, 168, 336, 1344, 2668

  1. 1334

  2. 2668

  3. 56

  4. 168

  5. 14

Show answer
Correct Option: B
Explanation:

Except 2668, all others are multiples of 7.

Directions: In the following numbers, one number is wrong. Find out the odd number.

20, 21, 25, 34, 49, 75, 111

  1. 49

  2. 25

  3. 20

  4. 75

  5. 111

Show answer
Correct Option: A
Explanation:

The differences between numbers are 12, 22, 32, 42, 52, 62.

20 + 12 = 21; 21 + 22 = 21 + 4 = 25;25 + 32 = 25 + 9 = 34;34 + 42 = 34 + 16 = 50; 50 + 52 = 50 + 25 = 75; 75 + 62 = 75 + 36 = 111. 49 is the odd number.

Directions: In the following numbers, one number is wrong. Find out the odd number.

327, 261, 204, 162, 129, 107, 96

  1. 261

  2. 204

  3. 129

  4. 107

  5. 96

Show answer
Correct Option: B
Explanation:

The differences between numbers are 66, 55, 44, 33, 22, 11. 327 – 66 = 261; 261 – 55 = 206; 206 – 44 = 162; 162 – 33 = 129; 129 – 22= 107; 107 – 11 = 96.  204 is the odd number.

Directions: In the following numbers, one number is wrong. Find out the odd number.

4, 16, 6, 36, 8, 64, 10, 81

  1. 10

  2. 81

  3. 64

  4. 16

  5. None of these

Show answer
Correct Option: B
Explanation:

The sequence is (2n) : (2n)2. 4 : 42; 6 : 62; 8 : 82; 10 : 102  81 is odd man.

Directions: In the following numbers, one number is wrong. Find out the odd number.

4, 64, 5, 126, 6, 216, 7, 343

  1. 64

  2. 5

  3. 126

  4. 216

  5. None of these

Show answer
Correct Option: C
Explanation:

The sequence is n : n3. i.e. 4 : 43; 5 : 53; 6 : 63; 7 : 73. 126 is the odd one out.

Directions: In the following numbers, one number is wrong. Find out the odd number.

7, 10, 9, 10, 11, 14, 13

  1. 7

  2. 9

  3. 14

  4. 13

  5. 10

Show answer
Correct Option: E
Explanation:

The sequence consists of two series. 7, 9, 11, 13 and 10, 12, 14, 16.  10 is odd man.

Directions: In the following numbers, one number is wrong. Find out the odd number.

40, 30, 21, 12, 6, 0, – 5

  1. 12

  2. 30

  3. 21

  4. 6

Show answer
Correct Option: A
Explanation:

The differences between the numbers are – 10, – 9, – 8, – 7, – 6, – 5. 40 – 10 = 30; 30 – 9 = 21; 21 – 8 = 13; 13 – 7 = 6; 6 – 6 = 0; 0 – 5 = – 5. 12 is the odd number.

Directions: In the following numbers, one number is wrong. Find out the odd number.

3, 5, 10, 12, 24, 26, 48, 54

  1. 26

  2. 48

  3. 54

  4. 24

Show answer
Correct Option: B
Explanation:

The sequence is n, (n + 2), 2 (n + 2) etc. 3 + 2 = 5; 2 × 5 = 10; 10 + 2 = 12; 12 × 2 = 24; 24 + 2 = 26; 26 × 2 = 52; 48 is odd - man.

Directions: In the following number series, one number is wrong. Find out the odd number.

3, 6, 9, 18, 72, 360, 2160

  1. 3

  2. 9

  3. 18

  4. 72

  5. 360

Show answer
Correct Option: B
Explanation:

The sequence is × 1, × 2, × 3, × 4, × 5 etc. i.e., 3 × 1 = 3; 3 × 2 = 6; 6 × 3 = 18; 18 × 4 = 72; 72 × 5 = 360; 360 × 6 = 2160. 9 is the odd one out.

Directions: In the following number series, one number is wrong. Find out the odd number.

3, 7, 15, 27, 63, 127, 255

  1. 7

  2. 15

  3. 27

  4. 63

  5. 127

Show answer
Correct Option: C
Explanation:

The sequence is (Number × 2) + 1 = Next number.

 (3 × 2) + 1 = 7; (7 × 2) + 1 = 15; (15 × 2) + 1 = 31; (31 × 2) + 1 = 63; (63 × 2) + 1 = 127;  (127 × 2) + 1 = 255. 27 is the odd one out.

Directions: In the following number series, one number is wrong. Find out the odd number.

2, 9, 30, 68, 130, 222, 350

  1. 9

  2. 30

  3. 68

  4. 130

  5. None of these

Show answer
Correct Option: A
Explanation:

The sequence is n3 + n, i.e. 13 + 1 = 2; 23 + 2 = 10; 33 + 3 = 30; 43 + 4 = 68; 53 + 5 = 130; 63 + 6 = 222; 73 + 7 = 350. 9 is the odd one out.

Directions: In the following number series, one number is wrong. Find out the odd number.

8, 24, 70, 216, 648, 1944

  1. 24

  2. 70

  3. 216

  4. 1944

  5. None of these

Show answer
Correct Option: B
Explanation:

The sequence is (number × 3) = next number. 8 × 3 = 24; 24 × 3 = 72; 72 × 3 = 216; 216 × 3 = 648; 648 × 3 = 1944. 70 is the odd one out.

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