• Number Classification Drill (Part II)
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Number Classification Drill (Part II)

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

  1. 25

  2. 36

  3. 49

  4. 81

  5. 121

Show answer
Correct Option: B
Explanation:

Except 36, others are squares of odd numbers.

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

  1. 6

  2. 7

  3. 8

  4. 9

  5. 10

Show answer
Correct Option: B
Explanation:

Only 7 is prime number, others are composite numbers.

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

  1. 64

  2. 81

  3. 100

  4. 144

  5. 196

Show answer
Correct Option: B
Explanation:

Except 81, others are squares of even numbers.

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

  1. 19

  2. 39

  3. 59

  4. 79

  5. 89

Show answer
Correct Option: B
Explanation:

Except 39, others are prime numbers.

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

  1. 3

  2. 13

  3. 23

  4. 33

  5. 43

Show answer
Correct Option: D
Explanation:

Except 33, others are prime numbers.

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

  1. 25

  2. 35

  3. 40

  4. 45

  5. 55

Show answer
Correct Option: C
Explanation:

Except 40, others are odd numbers.

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

  1. 35

  2. 55

  3. 77

  4. 98

  5. 140

Show answer
Correct Option: B
Explanation:

Except 55, others are multiples of 7

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

  1. 9

  2. 18

  3. 50

  4. 72

  5. 98

Show answer
Correct Option: A
Explanation:

Except 9, other numbers when doubled become perfect squares.

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

  1. 80

  2. 270

  3. 360

  4. 1250

  5. 2160

Show answer
Correct Option: C
Explanation:

Except 360, other numbers when divided by 10 become perfect cubes.

Directions: In the following question one number is different from the rest of numbers .Find the odd one out

  1. 8

  2. 15

  3. 18

  4. 32

  5. 24

Show answer
Correct Option: B
Explanation:

Except 15, other numbers when doubled become perfect squares.

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

  1. 377

  2. 477

  3. 567

  4. 633

  5. 982

Show answer
Correct Option: E
Explanation:

Except 982, others are odd numbers.

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

8, 15, 24, 35, 50, 63, 80.

  1. 50

  2. 24

  3. 35

  4. 15

  5. 8

Show answer
Correct Option: A
Explanation:

The differences between the numbers are 7, 9, 11, 13, 15, 17 etc. (8 + 7 = 15; 15 + 9 = 24; 24 + 11 = 35; 35 + 13 = 48; 48 + 15 = 63; 63 + 17 = 80).  50 is odd man.

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

7, 11, 13, 17, 19, 21, 25, 29.

  1. 17

  2. 19

  3. 21

  4. 25

  5. 29

Show answer
Correct Option: C
Explanation:

The differences between numbers are alternately + 4 and + 2.    

 7 + 4 = 11; 11 + 2 = 13; 13 + 4 = 17; 17 + 2 = 19; 19 + 4 = 23; 23 + 2 = 25; 25 + 4 = 29.  21 is an odd man.

Directions: Find out the odd number.

  1. 763

  2. 975

  3. 877

  4. 666

  5. 563

Show answer
Correct Option: D
Explanation:

Except 666, the others are odd numbers.

Directions: Find the odd one out.

  1. 732

  2. 234

  3. 456

  4. 567

  5. 789

Show answer
Correct Option: A
Explanation:

All, except 732, are consecutive natural numbers.

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

  1. 100

  2. 400

  3. 700

  4. 900

  5. 1600

Show answer
Correct Option: C
Explanation:

Except 700, others are squares of numbers.

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

  1. 11

  2. 13

  3. 15

  4. 17

  5. 19

Show answer
Correct Option: C
Explanation:

Except 15, others are prime numbers. 

Directions: Find the odd one out.

  1. 8

  2. 64

  3. 216

  4. 343

  5. 512

Show answer
Correct Option: D
Explanation:

Except 343, all the others are cubes of even numbers.

Directions: Find the odd one out.

  1. 100

  2. 115

  3. 150

  4. 175

  5. 200

Show answer
Correct Option: B
Explanation:

Except 115, all the others are multiples of 25.

Directions: Find the odd one out.

  1. 345

  2. 456

  3. 258

  4. 237

  5. 246

Show answer
Correct Option: D
Explanation:

In all the other options, the middle digit is the average of the first and the last digits.

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