Practice Question and Answer
8 Q: In a class, the average score of girls in an examination is 73 and that of boys is 71. The average score for the whole class is 71.8. Find the percentage of girls.
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5dd62f0ca1c5834595c3d7e9- 140 %true
- 250 %false
- 355 %false
- 460 %false
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Answer : 1. "40 % "
Q: In a factory 60 % of the workers are above 30 years and of these 75 % are males and the rest are females. If there are 1350 male workers above 30 years, the total number of workers in the factory is:
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5dd62e9c7780ee35515aeb53- 13000true
- 22000false
- 31800false
- 41500false
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Answer : 1. "3000 "
Q: In an examination in which full marks were 500. A got 25% more than C, C got 20% less than D. If A got 360 marks. What percentage of full marks was obtained by D ?
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5dd62e2fdb51363c02391f8f- 172%true
- 280%false
- 360%false
- 450%false
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Answer : 1. "72% "
Q: 40 men can complete a piece of work in 40 days. They started the work together. But at the end of each 10th day, 5 men left the job. The work would have been completed in
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5dd62ac4c2282c484e4b3a66- 1$$ 56{2\over 3} days $$true
- 2$$ 53{1\over 3} days $$false
- 352 daysfalse
- 450 daysfalse
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Answer : 1. "$$ 56{2\over 3} days $$"
Q: A takes twice as much time as B and thrice as much as c to complete a piece of work. They together complete the work in 1 day. in what time, will A alone complete the work.
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5dd62736db51363c0239034b- 19 daysfalse
- 25 daysfalse
- 36 daystrue
- 44 daysfalse
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Answer : 3. "6 days "
Q: If two persons, with equal abilities, can do two jobs in two days then 100 persons with equal abilities can do 100 similar jobs in
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5dd6267f7780ee35515ac582- 1100 daysfalse
- 210 daysfalse
- 35 daysfalse
- 42 daystrue
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Answer : 4. "2 days "
Q: If p men working p hours per day for p days produce p units of work, then the units of work produced by n men working n hours a day for n days is
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5dd625b5a1c5834595c3b0bf- 1$${p^2}\over {n^2} $$false
- 2$${p^3}\over {n^2} $$false
- 3$${n^2}\over {p^2} $$false
- 4$${n^3}\over {p^2} $$true
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Answer : 4. "$${n^3}\over {p^2} $$"
Q: A person travels 600 km by train at 80 km/hr 800 km by ship at 400 km/ hr and 100 km by car at 50 km/hr. What is the average speed for the entire distance?
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5dd625497780ee35515ac19d- 1$$ 65{5\over 123} km.hr$$false
- 2$$ 130{10\over 23} km.hr$$true
- 3$$ 60{5\over 123} km.hr$$false
- 462 km.hrfalse
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