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DBBL Probationary Officer-2011

31. The cost of manufacturing x water pumps is Tk. 9000+400x. The amount received by selling these x water pumps is Tk. 500x. Water is the least number of water pumps that must be manufactured and sold so that the amount received is at least equal to the manufacturing cost?

[DBBL Probationary Officer-2011 : 2011]

1. 50

2. 60

3. 90

4. 100

5. None of these

Answer

32. Boddy, an office sectary, typed 6 letters, each of which had either 1 or 2 pages. If Boddy typed 10 pages in all, how many of the letters had 2 pages?

[DBBL Probationary Officer-2011 : 2011]

1. 1

2. 2

3. 4

4. 5

5. None of these

Answer

33. Zaman lives 4 k.m. due west of Parul's house. Abul lives 6 k.m. due north of Parul's house and 4 k.m due west of Dipu's house. What is the straight-line distance from Zaman's house to Dipu's house?

[DBBL Probationary Officer-2011 : 2011]

1. 4 k.m

2. 6 km

3. 8 k.m

4. 10 k.m

5. None of these

Answer

34. The number 0.01 is how many times as great as the number (0.0001)2

[DBBL Probationary Officer-2011 : 2011]

1. 10²

2. 10⁴

3. 10⁶

4. 10⁸

5. None of these

Answer

35. Pallab has exactly 3 times as many Bangladeshi as non Bangladeshi stamps in his collection. Which of the following cannot be the number of stamps in Pallab collection?

[DBBL Probationary Officer-2011 : 2011]

1. 54

2. 68

3. 96

4. 72

5. All of these can be

Answer