Maths Practice Question and Answer
8 Q: An octahedron has 12 edges, How many vertices does it have,
3433 05eff06ba2ebd8e6aa8c2088c
5eff06ba2ebd8e6aa8c2088c- 110false
- 26true
- 38false
- 418false
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Answer : 2. " 6 "
Q: The ratio of managers to management trainees is 3:5. When 21 new management trainees are recruited, the ratio will become 3:8. How many managers will there be in the group? 3433 05d1b03a78a754124194a7515
5d1b03a78a754124194a7515- 127false
- 224false
- 321true
- 4Cannot be determinedfalse
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Answer : 3. "21"
Q: If the least common multiple of two numbers, 1728 and K is 5184, then how many values of K are possible?
3432 05f082974bc929f40b0bb09eb
5f082974bc929f40b0bb09eb- 16false
- 27true
- 311false
- 48false
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Answer : 2. "7"
Q:What will come in place of the question mark (?) in each of the following series?
15 19 83 119 631 (?)
3421 05eb151315a48d373519c8fcf
5eb151315a48d373519c8fcf- 1731true
- 2693false
- 3712false
- 4683false
- 5None of thesefalse
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Answer : 1. "731"
Q: 260-metre-long train can cross a wall of 120 metre in 19 seconds. What is the speed of train in km/hr? 3418 15d15df2a7567c2609b568584
5d15df2a7567c2609b568584- 127false
- 249false
- 372true
- 470false
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Answer : 3. "72"
Q: A 200 m long train passes a motorcycler, running in the same direction at 12 km/hr, in 15 second and a jeep travelling in the same direction in 20 s. At what speed is the car travelling (length of both the motorcycler and jeep is negligible)? 3416 05b5cc607e4d2b4197774b502
5b5cc607e4d2b4197774b502- 136 kmphfalse
- 232 kmphfalse
- 329 kmphfalse
- 424 kmphtrue
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Answer : 4. "24 kmph"
Explanation :
Answer: D) 24 kmph Explanation: Let the speed of the train be 'S' kmph From the given data, Distance = Length of train = D = 200 mts = 200 x 18/5 kms Time = 10 sec given speed of the motorcycler = 12 kmph Relative speed as they are moving in the same direction = (S - 12) kmph (S- 12) = 200 x 18515S - 12 = 48S = 60 kmph Hence, the speed of the train = S = 60 kmph Now, Let the speed of the jeep be 'x' kmph 60 - x = 200 x 1852060 - x = 36x = 60 - 36x = 24 kmph Therefore, the speed of the jeep = x = 24 kmph.
Q: Sudhir and Shyam can do a work in 12 days, while Shyam alone can complete it in 30 days. In how many days can Sudhir complete that work alone?
3414 05fa694644e71ba46b01f0d44
5fa694644e71ba46b01f0d44- 120 daystrue
- 218 daysfalse
- 328 daysfalse
- 430 daysfalse
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Answer : 1. "20 days "
Q: In solving a problem, one student makes a mistake in the coefficient of the first degree term and obtains – 9 and – 1 for the roots. Another student makes a mistake in the constant term of the equation and obtains 8 and 2 for the roots. The correct equation was
3409 05e327c5bd0aa6f23a8fc6e21
5e327c5bd0aa6f23a8fc6e21- 1x2 + 10x + 9 = 0false
- 2x2 – 10x = 16 = 0false
- 3x2 – 10x + 9 = 0true
- 4None of thesefalse
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