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Number Classification

Description: Number Classification
Number of Questions: 10
Created by:
Tags: Number Classification Number Series, Letter Series Odd one out Classification
Attempted 0/10 Correct 0 Score 0

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


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.

11, 15, 17, 19, 23, 25

  1. 19

  2. 11

  3. 15

  4. 17

  5. 23


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


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


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.

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

  1. 49

  2. 25

  3. 20

  4. 75

  5. 111


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


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

  1. 64

  2. 5

  3. 126

  4. 216

  5. None of these


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.

40, 30, 21, 12, 6, 0, – 5

  1. 12

  2. 30

  3. 21

  4. 6


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 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


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


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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