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Home ‣ Aptitude ‣ Odd Man Out and Series Comments
- Question
3, 5, 7, 12, 17, 19
Options- A. 19
- B. 17
- C. 5
- D. 12
- Correct Answer
- 12
ExplanationEach of the numbers is a prime number except 12. - 1. 41, 43, 47, 53, 61, 71, 73, 81
Options- A. 61
- B. 71
- C. 73
- D. 81 Discuss
- 2. 835, 734, 642, 751, 853, 981, 532
Options- A. 751
- B. 853
- C. 981
- D. 532 Discuss
- 3. 331, 482, 551, 263, 383, 362, 284
Options- A. 263
- B. 383
- C. 331
- D. 551 Discuss
- 4. 16, 25, 36, 72, 144, 196, 225
Options- A. 36
- B. 72
- C. 196
- D. 225 Discuss
- 5. 10, 14, 16, 18, 21, 24, 26
Options- A. 26
- B. 24
- C. 21
- D. 18 Discuss
- 6. The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:
Options- A. 70 km/hr
- B. 75 km/hr
- C. 84 km/hr
- D. 87.5 km/hr Discuss
- 7. A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.
Options- A. 220 km
- B. 224 km
- C. 230 km
- D. 234 km Discuss
- 8. If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:
Options- A. 50 km
- B. 56 km
- C. 70 km
- D. 80 km Discuss
- 9. In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is:
Options- A. 1 hour
- B. 2 hours
- C. 3 hours
- D. 4 hours Discuss
- 10. A car travelling with 5⁄7 of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.
Options- A.
17 6 km/hr 7 - B. 25 km/hr
- C. 30 km/hr
- D. 35 km/hr Discuss
Odd Man Out and Series problems
Search Results
Correct Answer: 81
Explanation:
Each of the numbers except 81 is a prime number.
Correct Answer: 751
Explanation:
In each number except 751, the difference of third and first digit is the middle one.
Correct Answer: 383
Explanation:
In each number except 383, the product of first and third digits is the middle one.
Correct Answer: 72
Explanation:
Each of the numbers except 72 is a perfect square.
Correct Answer: 21
Explanation:
Each of the numbers except 21 is an even number.
Correct Answer: 87.5 km/hr
Explanation:
Let the speed of two trains be 7x and 8x km/hr.
| Then, 8x = | ❨ | 400 | ❩ | = 100 |
| 4 |
| ⟹ x = | ❨ | 100 | ❩ | = 12.5 |
| 8 |
∴ Speed of first train = (7 x 12.5) km/hr = 87.5 km/hr.
Correct Answer: 224 km
Explanation:
| (1/2)x | + | (1/2)x | = 10 |
| 21 | 24 |
| ⟹ | x | + | x | = 20 |
| 21 | 24 |
⟹ 15x = 168 x 20
| ⟹ x = | ❨ | 168 x 20 | ❩ | = 224 km. |
| 15 |
Correct Answer: 50 km
Explanation:
Let the actual distance travelled be x km.
| Then, | x | = | x + 20 |
| 10 | 14 |
⟹ 14x = 10x + 200
⟹ 4x = 200
⟹ x = 50 km.
Correct Answer: 1 hour
Explanation:
Let the duration of the flight be x hours.
| Then, | 600 | - | 600 | = 200 |
| x | x + (1/2) |
| ⟹ | 600 | - | 1200 | = 200 |
| x | 2x + 1 |
⟹ x(2x + 1) = 3
⟹ 2x2 + x - 3 = 0
⟹ (2x + 3)(x - 1) = 0
⟹ x = 1 hr. [neglecting the -ve value of x]
Correct Answer: 35 km/hr
Explanation:
| Time taken = 1 hr 40 min 48 sec = 1 hr 40 | 4 | min = 1 | 51 | hrs = | 126 | hrs. |
| 5 | 75 | 75 |
Let the actual speed be x km/hr.
| Then, | 5 | x x | 126 | = 42 |
| 7 | 75 |
| ⟹ x = | ❨ | 42 x 7 x 75 | ❩ | = 35 km/hr. |
| 5 x 126 |
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