Maths Practice Question and Answer
8 Q: A number of friends decided to go on picnic and planned to spend Rs. 108 on eatables. Three of them however did not turn up. As a consequence, each one of the remaining had to contribute Rs 3. extra. The number of them who attended the picnic was:
3064 05d77662ba1321a5b0b59561f
5d77662ba1321a5b0b59561f- 115false
- 212false
- 39true
- 46false
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Answer : 3. " 9"
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)? 3063 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: A wheel can travel 22 km. in 100 rounds. Find the radius of that wheel. 3062 05d10948187e3540b926c1bc0
5d10948187e3540b926c1bc0- 142 mtrfalse
- 228 mtr.false
- 335 mtrtrue
- 449 mtrfalse
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Answer : 3. "35 mtr"
Q: 260-metre-long train can cross a wall of 120 metre in 19 seconds. What is the speed of train in km/hr? 3058 15d15df2a7567c2609b568584
5d15df2a7567c2609b568584- 127false
- 249false
- 372true
- 470false
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Answer : 3. "72"
Q: Ram can complete ¼ th part of work in 8 days and Shyam can complete 2/4 th of the work in 6 days and Naresh can complete ¾th the work in 12 days. In how many days can they together complete it? 3050 15d147f2b9aeb0a08f1e6721a
5d147f2b9aeb0a08f1e6721a- 1false
- 2true
- 3false
- 4false
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Answer : 2. "
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
3048 05e327c5bd0aa6f23a8fc6e21
5e327c5bd0aa6f23a8fc6e21- 1x2 + 10x + 9 = 0false
- 2x2 – 10x = 16 = 0false
- 3x2 – 10x + 9 = 0true
- 4None of thesefalse
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Answer : 3. "x2 – 10x + 9 = 0"
Q: The average age of a family of 6 members is 22 years. If the age of the youngest member be 7 years the average of the family at the birth of the youngest member was -
3046 05f4cfe8caa6f1f4511a8fd9e
5f4cfe8caa6f1f4511a8fd9e- 117.5 yearsfalse
- 218 yearstrue
- 315 yearsfalse
- 417 yearsfalse
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Answer : 2. "18 years"
Q: What will come in place of question mark ( ? ) in the following series?
656, 352, 200, 124, 86, ?
3027 05ea6d4e1b8cf1d2fb8cc193e
5ea6d4e1b8cf1d2fb8cc193e656, 352, 200, 124, 86, ?
- 167true
- 259false
- 362false
- 457false
- 5None of thesefalse
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