1. $(52.{02}^2-{3401}^2)÷17.99\times \sqrt{?}=1720$

2. in a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant , approximately what percentage of the selling price is the profit?

3. A boat runs at 22 km per hour along the stream and 10 km per hour against the stream .Find the ratio of the speed of the boat in still water to that of the speed of the stream .

4. The time taken by a man to travel 36 miles downstream is 90 min less than to go the same distance upstream . The speed of the man in still water is 10 mph. Find the speed of the stream?

5. A tank has two leakages. The first leakage alone can empty the tank in 9 min and the second alone would have done it in 6 min. If water leaks out at a constant rate , how long does it take both the leakage together to empty the tank?

6. Two tarins running in opposite direction cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is :

7. A person borrows TK. 5000 for 2 years at 4% p.a. simple interest. He immediately lends it to another person at 6 1/4 % per annum for 2 years . Find his gain in the transaction per year.

8. A and B start at the same time with speeds of 40 km /hr and 50 km/hr respectively. If in covering the journey A takes 15 minutes longer than B, the total distance of the journey is -

9. Painter A can paint a house in 16 days and painter B can do the same work in 20 days . With the help of painter C, they paint the house in 8 days only. Then , Painter C alone can do this task in -

10. A bag contains 50 P , 25 P and 10 P coins in the ratio 5 : 9 : 4 amounting to TK. 206 .Find the number of coins of each type respectively .

11. $28\sqrt{?} +1426=\frac{3}{4}of 2872$

12. Two numbers are in the ratio 3 : 7 . If 6 be added to each of them, then they are in the ratio 5 : 9 Find the numbers?

13. The salaries of A , B and C are in the ratio of 1 : 2 : 3 The salary of B and C together is TK. 6000. By what percent is the salary of C more than that of A?

14. A tap can fill a tank in 6 hours. After half the tank is filled , three more similar taps are opened . What is the total time taken to fill the tank completely?

15. Fresh fruit contains 68% water and dry fruit contains 20% water, How much dry fruit can be obtained from 100 km of fresh fruits?

16. The length of a rectangle is halved, while its breadth is tripled. What is the percentage change in area?

17. A person's present age is two-fifth of the age of his mother. After 8 years , he will be one- half of the age of his mother . How old is the mother at present ?

18. A cylindrical rod of iron, whose height is equal to its radius, is melted and cast into spherical balls whose radius is half the radius of the rod . Find the number of balls.

19. A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is?

20. The sum of the present ages of a father and his son is 60 years. Five years ago, father's age was four times the age of the son. So now the son's age will be -

21. A bag contains 2 red Roses, 4 yellow Roses and 6 pink Roses. Two roses are drawn at random. What is the probability that they are not of same color?

22. Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ?

23. The compound interest on a certain sum of money for 2 years at 10% per annum is TK. 420 . The simple interest on the same sum at the same rate and for same time will be?

24. I f the rate of simple interest is 12% per annum the amount that would fetch interest of TK. 6000 per annum is ?

25. One -fourth of the boys and three -eight of the girls in a school participated in the annual sports. What proportional part of the total student population of the school participated in the annul sports?

26. A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup , How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?

27. If ${(p/q)}^{x-1}={(q/p)}^{x-3},then the value of n is...$

28. The marked price of an article is TK. 500. It is sold on two successive discounts of 20% and 10% .The selling price of that article is

29. . A, B and C enter into a partnership with a certain capital in which A's contribution is TK. 10,000. If out of a total profit of TK. 1,000, A gets Tk. 500, B gets Tk. 300the C's capital is

30. A man can walk uphill at the rate of 2.5 hm/hr and downhill at the rate of 3.25 km/hr. If the total time required walking a certain distance up the hill and return to the starting position is 4 hr 36 min, what is the distance he walked up the hill?

31. What is a portion of a document in which you set certain page formatting options?

32. Which of the following keyboard shortcut can be used for creating a chart from the selected cells ?

33. What is a portion of a document in which you set certain page formatting options?

34. Which of the following requires computer memory in large amounts?

35. Identify the volatile storage device amongst the following devices?

36. A commonly used graphic format for the Web is -

37. The acid name of Vitamin B is -

38. The branch of science that studies cells is called.

39. Queensland and Northern Territory Aerial Service is an International Airline of -

40. Name the instrument used to measure relative humidity -

41. In which year a resolution "Uniting for Peace " was adopted by UN General Assembly?

42. To open an existing workbook ,click Open button on the --- toolbar ?

43. Web site's main page is called its -

44. Which of these toolbars allows changing Fonts and their sizes?

45. Which Key will open an Open dialogue box?

46. Radio link is a tool of banking communication in a -

47. The significance of peace is denoted by which of the following symbol?

48. The lower limit of perpetual snow in mountains such as the Himalayas is termed as the -

49. The longest rail line of the world. Trans - Siberaian line, is in -

50. The market condition when goods and services are not freely available and thus the prices are relatively high is called -

51. LENGTHEN : PROLONG

52. EXCITE : CALM

53. ANARCHY : GOVERNMENT

54. SUBMISSIVE : DISOBEDIENT

55. DELAY : EXPEDITE

56. ........ pollution control measures are expensive ; many industries hesitate to adopt them.

57. It is not .... for a man to be confined to the pursuit of wealth .

58. If you smuggle goods into the country, they may be ...... by the customs authority .

59.