bangladesh bank assistant director

BB Assistant Director-2014

46. The average of first nine prime number is:

[BB Assistant Director-2014 : 2014]

1. 9

2. 11

3. 11¹⁄₉

4. 11²⁄₉

Answer

47. If the compound interest on a sum for 2 years at 12.5% per annum is Tk. 510 the simple interest on the same sum at the same rate for the same period of time is:

[BB Assistant Director-2014 : 2014]

1. Tk. 400

2. Tk. 450

3. Tk. 460

4. Tk. 480

Answer

48. A man can do a piece of work in 5 days. But with the help of his son, he can do it in 3 days. In what time can the son do it alone?

[BB Assistant Director-2014 : 2014]

1. 6.5 days

2. 7 days

3. 7.5 days

4. 8 days

Answer

49. Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together then how long it will take to fill the tank?

[BB Assistant Director-2014 : 2014]

1. 12 min

2. 15 min

3. 25 min

4. 50 min

Answer

50. An express train traveled at an average speed of 100km/hr. stopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point.

[BB Assistant Director-2014 : 2014]

1. 6 hrs 21 min

2. 6 hrs 24 min

3. 6 hrs 27 min

4. 6 hrs 30 min

Answer