If the sum of a b and c is twice the sum of a minus b and a minus c and the difference of a plus b and a minus c is 3 then value of a is:
Correct answer E. 3
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See allThere are 40 minutes to solve a test of 60 questions. A student completes 20 questions in 20 minutes. He continues with the same speed and leaves the hall 10 minutes earlier. The number of questions solved by him is:
Correct answer B. 30
If a man earns Rs. 500 for his first 40 hours of work in a week and is then paid double of his regular hourly rate. He earned Rs.600 in a week. How many hours he worked in that week:
Correct answer E. 44
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In a 3 hour examination of 310 questions there are 50 math problems. If twice as much time should be allowed for each problem of math as for each of the other questions how many minutes should be spent on the math problems?
Correct answer B. 50
How many students are there in the class if 2 students remain after 4 rows of seats are filled and 9 students remain after 3 rows of seats are filled?
Correct answer E. 30
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