Number Based MCQ Quiz - Objective Question with Answer for Number Based - Download Free PDF

Last updated on Jun 6, 2025

This is a frequently asked topic in the competitive exams. In this topic, a pair of numbers is given in which the numbers are related to each other in a logical way. We have to find the similar concept which is used in the question and find out the correct option. These types of problems ask for finding the wrong option which does not follow the concept or right option which follows the concept given in the problem. Don't confuse these two terms. Number Based Classification Problems contain numbers in pairs. First identify the concept used in the given numbers i. e factors of numbers, square/cube of numbers etc. The number given in the question depends on the other number which is given in pairs. If a question asks to find the wrong option, we have to check all options carefully, find similar concept options and find the odd one. Keep practicing this topic on the Testbook and boost your marks easily in the logical reasoning section

Latest Number Based MCQ Objective Questions

Number Based Question 1:

Find the odd numbers from the given alternatives.

  1. 121
  2. 81
  3. 169
  4. 49
  5. None of the above

Answer (Detailed Solution Below)

Option 2 : 81

Number Based Question 1 Detailed Solution

The logic follows here is:-

Square root of each number gives a prime number, except 9.

Let's check each option:-

1) 121 = (11). Here 11 is prime number.

2) 81 = (9). Here 9 is not prime number.

3) 169 = (13). Here 13 is prime number.

4) 49 = (7). Here 7 is prime number.

Hence, '81' is odd number among given alternatives.

Number Based Question 2:

Four numbers have been given out of which three are alike in some manner, while one is different.

Choose the odd one.

  1. 125
  2. 729
  3. 1321
  4. 343
  5. None of the above

Answer (Detailed Solution Below)

Option 3 : 1321

Number Based Question 2 Detailed Solution

Here the logic is:

All options are cube of a perfect number but option 3 is not a cube of perfect number.

1) 125 → ∛125 → 5

2) 729 → ∛729 → 9

3) 1321 → ∛1321 → 10.96

4) 343 → ∛343 → 7

Hence, ‘1321’ is the correct answer

Number Based Question 3:

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.

  1. (16, 112)
  2. (15, 105)
  3. (18, 128)
  4. (17, 119)
  5. None of the above

Answer (Detailed Solution Below)

Option 3 : (18, 128)

Number Based Question 3 Detailed Solution

The logic is here is:

Ratio of first number to second number is equal to 1/7.

Option (1): (16, 112)

16 / 112 = 1 / 7

Option (2): (15, 105)

15 / 105 = 1 / 7

Option (3): (18, 128)

18 / 128 = 9 / 64

Option (4): (17, 119)

17 / 119 = 1 / 7

The option (3) is ratio not equal to other option.

Hence, pair (18, 128) is an odd one.

Alternate MethodThe logic followed here is:

The second number is the completely divisible by the first number.

Option (1): (16, 112) → 112 is divisible by 16.

Option(2): (15, 105) → 105 is divisible by 15.

Option(3): (18, 128) → 128 is not divisible by 18.

Option(4): (17, 119) → 119 is divisible by 17.

In the above options, the 2nd number is completely divided by the 1st number.

In option (3), does not follow the pattern.

Hence, pair (18, 128) is an odd one.

Number Based Question 4:

Select the option in which the numbers share the same relationship as that shared by the given pair of numbers.

52 : 59

  1. 66:72
  2. 88:116
  3. 46:94
  4. 66:78
  5. 88:120

Answer (Detailed Solution Below)

Option 4 : 66:78

Number Based Question 4 Detailed Solution

The logic followed here is:

  • 52 : 59
  • 5 + 2 = 7
  • (7) + 52 = 59

Option 1

66 : 72

6 + 6 = 12

(12)+ 66 ≠ 72 

78 ≠ 72

Option 2

88 : 116

8 + 8 = 16

(16) + 88 ≠ 116

104 ≠ 115

Option 3

46 : 94

4 + 6 = 10

(10) + 46 ≠ 94

56 ≠ 94

Option 4

66 : 78

6 + 6 = 12

(12) + 66 = 78

Hence, the correct answer is "Option 4".

Number Based Question 5:

Select the option in which the numbers share the same relationship as that shared by the given pair of numbers.

78 : 64

  1. 87:64
  2. 84:56
  3. 88:74
  4. 76:64
  5. 88:78

Answer (Detailed Solution Below)

Option 3 : 88:74

Number Based Question 5 Detailed Solution

The pattern followed here is,

For,

78 : 64

(First Digit of the first number) - 1 and half of the second number = 64 

(7 - 1) (8 ÷ 2) 

64 = 64.

Similarly,

(1) 87 : 64

(8 - 1) (7 ÷ 2)

7 (3.5) 

63.5 ≠ 64.

(2) 84 : 56

(8 - 1) (4 ÷ 2)

72 ≠ 56

(3) 88: 74

(8 - 1) 8 ÷ 2

74 = 74 

(4) 76 : 64

(7 - 1) (6  ÷ 2)

63 ≠ 64

Hence, the correct answer is "68 : 54".

Top Number Based MCQ Objective Questions

Four options have been given out of which three are alike in some manner, while one is different. Choose the odd one.

  1. 2321
  2. 825
  3. 1521
  4. 968

Answer (Detailed Solution Below)

Option 3 : 1521

Number Based Question 6 Detailed Solution

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The logic followed here is:

All the numbers except option (3), the given numbers are the multiple of 11. 

Option1: 2321 → Multiple of 11

Option2: 825 → Multiple of 11

Option3: 1521 → Not a multiple of 11

Option4: 968 → Multiple of 11

Therefore, 1521 is the odd one option.

Important Points

  • The priority will always be the prime number in the exams.
  • There are some standard rules which need to be followed while selecting the priority.
  • priority lists to be followed in exams according to their preferences are:
  1. Prime number.
  2. Square.
  3. Cube.
  4. Multiplication and divisions
  5. Addition and subtraction.
  • A prime number can be divided, without a remainder, only by itself and by 1.
  • Some facts about the Prime numbers:
  1. The only even prime number is 2. All other even numbers can be divided by 2.
  2. If the sum of a number's digits is a multiple of 3, that number can be divided by 3.
  3. No prime number greater than 5 ends in a 5. Any number greater than 5 that ends in a 5 can be divided by 5.
  4. Zero and 1 are not considered prime numbers.
  5. Except for 0 and 1, a number is either a prime number or a composite number. A composite number is defined as any number, greater than 1, that is not prime.

Three of the following four number-pairs are alike in a certain way and one is different. Select the one that is different.

  1. 5 ∶ 105
  2. ∶ 180
  3. ∶ 294
  4. ∶ 48

Answer (Detailed Solution Below)

Option 1 : 5 ∶ 105

Number Based Question 7 Detailed Solution

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The logic followed here is :-

5 ∶ 105 → \({5^3 - 5^2}\) → 125 - 25 = 100

6 ∶ 180 → \({6^3 - 6^2}\) → 216 - 36 = 180

7 ∶ 294 → \({7^3 - 7^2}\) → 343 - 49 = 294

4 ∶ 48 → \({4^3 - 4^2}\) → 64 - 16 = 48

Hence, 5 ∶ 105 is different from other three alternatives.

Thus, the correct answer is "5 ∶ 105".

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different.

  1. 548 - 105
  2. 113 - 15
  3. 166 - 73
  4. 316 - 46

Answer (Detailed Solution Below)

Option 2 : 113 - 15

Number Based Question 8 Detailed Solution

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The pattern followed here is,

Option 1 → 52 + 42 + 82 = 105

Option 2 → 12 + 12 + 32 = 11 ≠ 15

Option 3 → 12 + 62 + 62 = 73

Option 4 → 32 + 12 + 62 = 46

All option follows the same pattern, except ‘113 - 15’

Hence, "113 - 15" is the correct answer.

In the following question, four number groups are given. In each group the three numbers are related to each other by some Logic/Rule/ Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

  1. (12, 24, 41)
  2. (13, 26, 43)
  3. (16, 32, 49)
  4. (17, 34, 53)

Answer (Detailed Solution Below)

Option 4 : (17, 34, 53)

Number Based Question 9 Detailed Solution

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The pattern followed here is,

Second Number = First number × 2

Third Number = Second number + 17

Option (1): (12, 24, 41) → 

12 × 2 = 24

24 + 17 = 41

Option (2):  (13, 26, 43) → 

13 × 2 = 26

26 + 17 = 43

Option (3): (16, 32, 49) → 

16 × 2 = 32

32 + 17 = 49

Option (4): (17, 34, 53) → 

17 × 2 = 34

34 + 17 = 51 ≠ 53

Hence, "(17, 34, 53)" is the odd one out.

The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair

  1. 16:1024
  2. 14:784
  3. 18:1620
  4. 12:576

Answer (Detailed Solution Below)

Option 3 : 18:1620

Number Based Question 10 Detailed Solution

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The logic followed here is: 

Let us go through the options: 

option 1) 

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Here 32 x 32 is  equal to 1024.

option 2) 

F3 Madhuri SSC 14.10.2022 D1 V2

Here 28 x 28 is  equal to 784. 

Option 3)

 F3 Madhuri SSC 14.10.2022 D2 V2

Here 36 x 36 is not equal to 1620.It is 1296.

option 4) 

F3 Madhuri SSC 14.10.2022 D3 V2

Here 24 x 24 is equal to 576.

Hence, "18:1620" is the correct answer.

Select the odd numbers from the given alternatives.

  1. 94
  2. 63
  3. 35
  4. 18

Answer (Detailed Solution Below)

Option 3 : 35

Number Based Question 11 Detailed Solution

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The pattern followed is:

94 → reverse 49 → 72

63 → reverse 36 → 62

35 → reverse 53 → no square

18 → reverse 81 → 92

Hence, the correct answer is "35".

Pick the odd one out. 

28, 44, 68, 80, 92

  1. 28
  2. 44
  3. 80
  4. 92

Answer (Detailed Solution Below)

Option 3 : 80

Number Based Question 12 Detailed Solution

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The pattern followed here is,

28 = 7 × 4 

44 = 11 × 4

68 = 17 × 4

80 = 20 × 4

92 = 23 × 4 

Except 80, all the odd multiples of 4.

Hence, 80 is odd among given. 

NOTE: This Question was Asked in the Official examination and the answer marked here is the official answer given by the exam conducting authority. There can be multiple answers possible by different logics. Here, the answer given in the official exam is followed.

Select the option in which the numbers are related in the same way as are the numbers of the following set.

(25, 18, 225) 

  1. (9, 16, 170)
  2. (24, 22, 264)
  3. (15, 34, 190)
  4. (17, 15, 220)

Answer (Detailed Solution Below)

Option 2 : (24, 22, 264)

Number Based Question 13 Detailed Solution

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The logic is:

(25, 18, 225) → (25 × 18) ÷ 2 = 450 ÷ 2 = 225 

Similarly,

(24, 22, 264) → (24 × 22) ÷ 2 = 528 ÷ 2 = 264 

Hence, ‘(24, 22, 264)’ is the correct answer.

In the following question, four number pairs are given. In each pair the number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule /Relation. Three pairs are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g.13 – Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

  1. 28125 – 3125
  2. 11322 – 1258
  3. 49374 – 5483
  4. 49401 – 5489

Answer (Detailed Solution Below)

Option 3 : 49374 – 5483

Number Based Question 14 Detailed Solution

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The logic followed here is:

Logic: 1st number ÷ 9 = 2nd number.

Now, checking the options:

Option 1) 28125 – 3125 → 28125 ÷ 9 = 3125.

Option 2) 11322 – 1258 → 11322 ÷ 9 = 1258.

Option 3) 49374 – 5483 → 49374 ÷ 9 = 5486 ≠ 5483.

Option 4) 49401 – 5489 → 49401 ÷ 9 = 5489.

So, '49374 – 5483' odd among the given options.

Hence, the correct answer is "Option 3".

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the odd one.

  1. 5 : 26
  2. 13 : 175
  3. 4 : 17
  4. 11 : 122

Answer (Detailed Solution Below)

Option 2 : 13 : 175

Number Based Question 15 Detailed Solution

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The logic is:

1) 5 : 26 → 5 : 52 + 1

2) 13 : 175 → 13 : 132 + 1 ≠ 175

3) 4 : 17 → 4 : 42 + 1

4) 11 : 122 → 11 : 112 + 1

Hence, '13 : 175' is the odd one out.

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