Odd Man Out and Series problems
- 1. 10, 5, 13, 10, 16, 20, 19, (....)
Options- A. 22
- B. 40
- C. 38
- D. 23 Discuss
Correct Answer: 40
Explanation:
There are two series (10, 13, 16, 19) and (5, 10, 20, 40), one increasing by 3 and the other multiplied by 2.
- 2. 1, 4, 9, 16, 25, 36, 49, (....)
Options- A. 54
- B. 56
- C. 64
- D. 81 Discuss
Correct Answer: 64
Explanation:
Numbers are 12, 22, 32, 42, 52, 62, 72.
So, the next number is 82 = 64.
- 3. 2, 4, 12, 48, 240, (....)
Options- A. 960
- B. 1440
- C. 1080
- D. 1920 Discuss
Correct Answer: 1440
Explanation:
Go on multiplying the given numbers by 2, 3, 4, 5, 6.
So, the correct next number is 1440.
- 4. 8, 7, 11, 12, 14, 17, 17, 22, (....)
Options- A. 27
- B. 20
- C. 22
- D. 24 Discuss
Correct Answer: 20
Explanation:
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5 respectively.
- 5. 11, 13, 17, 19, 23, 29, 31, 37, 41, (....)
Options- A. 43
- B. 47
- C. 53
- D. 51 Discuss
Correct Answer: 43
Explanation:
Numbers are all primes. The next prime is 43.
- 6. 8, 24, 12, 36, 18, 54, (....)
Options- A. 27
- B. 108
- C. 68
- D. 72 Discuss
Correct Answer: 27
Explanation:
Numbers are alternatively multiplied by 3 and divided by 2.
So, the next number = 54 ? 2 = 27.
- 7. 2, 6, 12, 20, 30, 42, 56, (....)
Options- A. 61
- B. 64
- C. 72
- D. 70 Discuss
Correct Answer: 72
Explanation:
The pattern is 1 x 2, 2 x 3, 3 x 4, 4 x 5, 5 x 6, 6 x 7, 7 x 8.
So, the next number is 8 x 9 = 72.
- 8. 4, -8, 16, -32, 64, (....)
Options- A. 128
- B. -128
- C. 192
- D. -192 Discuss
Correct Answer: -128
Explanation:
Each number is the proceeding number multiplied by -2.
So, the required number is -128.
- 9. 7, 26, 63, 124, 215, 342, (....)
Options- A. 481
- B. 511
- C. 391
- D. 421 Discuss
Correct Answer: 511
Explanation:
Numbers are (23 - 1), (33 - 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1) etc.
So, the next number is (83 - 1) = (512 - 1) = 511.
- 10. 5, 10, 13, 26, 29, 58, 61, (....)
Options- A. 122
- B. 64
- C. 125
- D. 128 Discuss
Correct Answer: 122
Explanation:
Numbers are alternatively multiplied by 2 and increased by 3.
So, the missing number = 61 x 2 = 122.
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