71.The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then the average of the remaining numbers is nearly:
 A. 28.32
 B. 28.78
 C. 29.27
 D. 29.68
 
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72.If 35% of a number is 12 less than 50% of that number, then the number is:
 A. 40
 B. 50
 C. 60
 D. 80
 
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73.By selling an article for Rs. 100, a man gains Rs. 15. Then, his gain% is:
 A. 15%
 B. 12 2/3%
 C. 17 11/17%
 D. 17 1/4%
 
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74.If a carton containing a dozen mirrors is dropped, which of the following cannot be the ratio of broken mirrors to unbroken mirrors?
 A. 2: 1
 B. 3: 1
 C. 3: 2
 D. 7: 5
 
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75.If 5 men or 9 women can do a piece of work in 19 days, then in how many days will 3 men and 6 women do the same work?
 A. 12
 B. 15
 C. 18
 D. 21
 
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76.A contractor employed 30 men to do a piece of work in 38 days. After 25 days, he employed 5 men more and the work was finished one day earlier. How many days he would have been behind, if he had not employed additional men?
 A. 1
 B. 1 ¼
 C. 2
 D. 1 ½
 
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77.An express train travelled at an average speed of 100 km/hr, stopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point?
 A. 6 hrs 21 min
 B. 6 hrs 24 min
 C. 6 hrs 27 min
 D. 6 hrs 30 min
 
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78.In what time will a train 100 metres long cross an electric pole, if its speed be 144 km/hr?
 A. 2.5 seconds
 B. 4.25 seconds
 C. 5 seconds
 D. 12.5 seconds
 
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79.Find the ratio in which rice at Rs. 20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.
 A. 1 : 3
 B. 2 : 3
 C. 3 : 4
 D. 4 : 5
 
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80.A can run 22.5 m in a certain time while B runs 25 m in that time. In a kilometre race B beats A by how many metres:
 A. 100m
 B. 111 1/9 m
 C. 25m
 D. 50m
 
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