Aptitude Question Papers

21. The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby decreasing the average by 4 years. The original strength of the class was :

22. A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in it sbottom. If the cistern is full, the leak will empty it in:

23. The difference between simple interest and compound interest on a sum for 2 years at 8% when the interest is compounded annually is Rs.16. If the interest were compounded half yearly, the difference in two interests would be nearly:

24. At what time between 9 and 10 will the hands of a watch be together ?

25. If I purchased 11 books for Rs. 10 and sold all the books at the rate of 10 books for Rs. 11, the profit per cent is:

26. A fraction becomes 4 when 1 is added to the both the numerator and denominator; and it becomes 7 when 1 is subtracted from both the numerator and denominator. The numerator of the given fraction is:

27. The current of a stream runs at 1 km/hr. A motor boat goes 35 km upstream and back again to the starting point in 12 hours. The speed of motorboat in still water is :

28. A man sold 20 articles for Rs. 60 and gained 20%. How many articles did he buy for Rs.60?

29. X an Y are two stations 500 km apart. A train starts form X and moves towards Y at 20 km/hr. Another rain starts from Y at the same time and moves towards X at 30 km/hr. How far from X will they cross each other:

30. P.V. Narsimha Rao was elected party leader on 29 th may. 1991. What was the day of the week?