1. Find the odd man out. 1, 3, 9, 12, 19, 29 | |

A. 12 | B. 9 |

C. 1 | D. 3 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

12 is an even number. All other given numbers are odd

2. Find the odd man out. 1, 8, 27, 64, 125, 196, 216, 343 | |

A. 64 | B. 196 |

C. 216 | D. 1 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

The pattern is 1^{3}, 2^{3}, 3^{3}, 4^{3}, 5^{3}, 6^{3}, 7^{3}.

196 is not a perfect cube

3. Find the odd man out. 15, 25, 30, 51, 85, 90, 115 | |

A. 15 | B. 25 |

C. 51 | D. 90 |

| Discuss |

Here is the answer and explanation

Answer : Option C

Explanation :

All except 51 are multiples of 5

4. Find the odd man out. 24,36,52,72,96 | |

A. 72 | B. 52 |

C. 36 | D. 24 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

All except 52 are multiples of 6

5. Find the odd man out. 187, 264, 386, 473, 682, 781 | |

A. 386 | B. 187 |

C. 781 | D. 682 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

In all numbers except 386, the middle digit is the sum of other two digits.

6. Find the odd man out. 12, 24, 34, 48, 64, 84 | |

A. 48 | B. 34 |

C. 24 | D. 12 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

All numbers except 34 are multiples of 4

7. Find the odd man out. 362, 482, 551, 263, 344, 284 | |

A. 362 | B. 482 |

C. 551 | D. 344 |

| Discuss |

Here is the answer and explanation

Answer : Option D

Explanation :

In all numbers except 344, the product of first and third digits is the middle digit.

8. Find the odd man out. 742, 743, 633, 853, 871, 990, 532 | |

A. 532 | B. 990 |

C. 633 | D. 742 |

| Discuss |

Here is the answer and explanation

Answer : Option D

Explanation :

In all numbers except 742, the difference of third and first digit is the middle digit.

9. Find the odd man out. 1, 5, 11, 17, 23, 29 | |

A. 29 | B. 17 |

C. 11 | D. 1 |

| Discuss |

Here is the answer and explanation

Answer : Option D

Explanation :

All given numbers except 1 are prime numbers.

One is not a prime number because it does not have two factors. It is divisible by only 1

10. Find the odd man out. 7,13,19,25,29,37,43 | |

A. 19 | B. 29 |

C. 25 | D. 43 |

| Discuss |

Here is the answer and explanation

Answer : Option C

Explanation :

All given numbers except 25 are prime numbers.

11. Find the odd man out. 1, 9, 16, 51, 121, 169, 225 | |

A. 169 | B. 51 |

C. 16 | D. 1 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

Each of the given numbers except 51 is a perfect square

12. Find the odd man out. 1, 4, 9, 17, 25, 36, 49 | |

A. 1 | B. 9 |

C. 17 | D. 49 |

| Discuss |

Here is the answer and explanation

Answer : Option C

Explanation :

The patter is 1^{2}, 2^{2}, 3^{2}, 4^{2}, 5^{2}, 6^{2}, 7^{2}

But, instead of 4^{2}, 17 is given

13. Find the odd man out. 2, 5, 10, 17, 26, 38, 50, 65 | |

A. 50 | B. 38 |

C. 26 | D. 65 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

The pattern is (1×1)+1 , (2×2)+1 , (3×3)+1 , (4×4)+1 , (5×5)+1 , (6×6)+1 , (7×7)+1 , (8×8)+1

Hence, in place of 38, the right number was (6×6)+1 = 37

14. Find the odd man out. 18, 16, 12, 24, 11, 34, 46 | |

A. 16 | B. 46 |

C. 16 | D. 11 |

| Discuss |

Here is the answer and explanation

Answer : Option D

Explanation :

11 is the only odd number in the given series

15. Find the odd man out. 1, 27, 216, 512, 1024, 1331 | |

A. 1024 | B. 512 |

C. 27 | D. 1 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

All given numbers except 1024 are perfect cubes

16. Find the odd man out. 1, 16, 81, 255, 625, 1296 | |

A. 255 | B. 1296 |

C. 81 | D. 1 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

The patter is 1^{4}, 2^{4}, 3^{4}, 4^{4}, 5^{4}, 6^{4}

Hence, in place of 255, the right digit is 4^{4} = 256

17. Find the odd man out. 6, 13, 18, 25, 30, 37, 40 | |

A. 40 | B. 30 |

C. 37 | D. 25 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

The difference between two successive terms from the beginning are 7, 5, 7, 5, 7, 5

Hence, in place of 40, right number is 37+5=42

18. Find the odd man out. 445, 221, 109, 46, 25, 11, 4 | |

A. 25 | B. 109 |

C. 46 | D. 221 |

| Discuss |

Here is the answer and explanation

Answer : Option C

Explanation :

To obtain next number, subtract 3 from the previous number and divide the result by 2

445

(445-3)/2 = 221

(221-3)/2 = 109

(109-3)/2 = 53

(53-3)/2 = 25

(25-3)/2 = 11

(11-3)/2 = 4

Clearly, 53 should have come in place of 46

19. Find the odd man out. 1050, 510, 242, 106, 46, 16, 3 | |

A. 46 | B. 106 |

C. 510 | D. 1050 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

1050

(1050 - 30)/2 = 510

(510 - 26)/2 = 242

(242 - 22)/2 = 110

(110 - 18)/2 = 46

(46- 14)/2 = 16

(16- 10)/2 = 3

Hence, 110 should have come in place of 106

20. Find the odd man out. 2, 3, 5, 9, 12, 17, 23 | |

A. 12 | B. 9 |

C. 23 | D. 2 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

2

2 + 1 = 3

3 + 2 = 5

5 + 3 = 8

8 + 4 = 12

12 + 5 = 17

17 + 6 = 23

ie, 8 should have come in place of 9

21. Find the odd man out. 3, 8, 18, 38, 78, 158, 316 | |

A. 38 | B. 158 |

C. 316 | D. 8 |

| Discuss |

Here is the answer and explanation

Answer : Option C

Explanation :

3

3 × 2 + 2 = 8

8 × 2 + 2 = 18

18 × 2 + 2 = 38

38 × 2 + 2 = 78

78 × 2 + 2 = 158

158 × 2 + 2 = 318

Hence, 316 is wrong and 318 should have come in place of that

22. Find the odd man out. 5, 6, 14, 45, 185, 925, 5556 | |

A. 5556 | B. 925 |

C. 185 | D. 6 |

| Discuss |

Here is the answer and explanation

Answer : Option C

Explanation :

5 × 1 + 1 = 6

6 × 2 + 2 = 14

14 × 3 + 3 = 45

45 × 4 + 4 = 184

184 × 5 + 5 = 925

925 × 6 + 6 = 5556

Hence, it is clear that 184 should have come instead of 185

23. Find the odd man out. 23, 27, 36, 52, 77, 111, 162 | |

A. 162 | B. 111 |

C. 52 | D. 27 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

23 + 2^{2} = 27

27 + 3^{2} = 36

36 + 4^{2} = 52

52 + 5^{2} = 77

77 + 6^{2} = 113

113 + 7^{2} = 162

Hence, 113 should have come in place of 111

24. Find the odd man out. 241, 263, 248, 271, 255, 277, 262 | |

A. 277 | B. 271 |

C. 263 | D. 241 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

Alternatively 22 is added and 15 is subtracted from the terms. Hence, 271 is wrong

241

241 + 22 = 263

263 - 15 = 248

248 + 22 = 270

270 - 15 = 255

255 + 22 = 277

277 - 15 = 262

25. Find the odd man out. 125, 127, 130, 135, 142, 153, 165 | |

A. 165 | B. 142 |

C. 153 | D. 130 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

Prime numbers 2, 3, 5, 7, 11, 13 are added successively. Hence, 165 is wrong

26. Find the odd man out. 5, 10, 40, 81, 320, 640, 2560 | |

A. 40 | B. 81 |

C. 320 | D. 2560 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

Alternatively 2 and 4 are multiplied with the previous terms

5

5 × 2 = 10

10 × 4 = 40

40 × 2 = 80

80 × 4 = 320

320 × 2 = 640

640 × 4 = 2560

Hence, 81 is wrong. 80 should have come in place of 81.

27. Find the odd man out. 12, 21, 32, 45, 60, 77, 95 | |

A. 95 | B. 45 |

C. 32 | D. 21 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

12 + 9 = 21

21 + 11 = 32

32 + 13 = 45

45 + 15 = 60

60 + 17 = 77

77 + 19 = 96

Hence, 95 is wrong. 96 should have come in place of 95

28. Find the odd man out. 3, 5, 15, 75, 1120, 84375 | |

A. 84375 | B. 1120 |

C. 15 | D. 3 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

Pattern : 1st * 2nd = 3rd, 2nd * 3rd = 4th, etc.

3

5

3 × 5 = 15

5 × 15 = 75

15 × 75 = 1125

75 × 1125 = 84375

Hence, 1120 is wrong. 1125 should have come in place of 1120

29. Find the odd man out. 3576, 1784, 888, 440, 216, 105, 48 | |

A. 105 | B. 216 |

C. 888 | D. 1784 |

| Discuss |

Here is the answer and explanation

Answer : Option A

Explanation :

3576

(3576-8)/2 = 1784

(1784-8)/2 = 888

(888-8)/2 = 440

(440-8)/2 = 216

(216-8)/2 = 104

(104-8)/2 = 48

Hence, 105 is wrong. 104 should have come in place of 105

30. Find the odd man out. 30, -5, -45, -90, -145, -195, -255 | |

A. -5 | B. -145 |

C. -255 | D. -195 |

| Discuss |

Here is the answer and explanation

Answer : Option B

Explanation :

30

30 - 35 = -5

-5 - 40 = -45

-45 - 45 = -90

-90 - 50 = -140

-140 - 55 = -195

-195 - 60 = -255

Hence, -145 is wrong. -140 should have come in place of -145

7= 6*1+1

13=6*2+1

19=6*3+1

25=6*4+1

29

37=6*6+1

43=6*7+1

Therefore, Odd one out is 29!

How to select the correct answer in the question if two conditions satisfy like aove?

In {12345 , 67890}, {54321 , 09876} and {56789 ,34567}, both left side pattern and right side pattern are in same direction (either in ascending order or descending order).

But in {23456, 98765}, left side pattern is in ascending order whereas right side pattern is in descending order.

136=1+3+6=10

352=3+5+2=10

460=4+6+0=10

324=3+2+4=09

631=6+3+1=10

244=2+4+4=10

Ans=324

Sum of digits of 324 is 9 whereas the sum of digits of each of the remaining number is 10

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