operations on numbers (6.papers)

hcf and lcm (5.papers)

averages (8.papers)

problems on ages (9.papers)

percentage (4.papers)

profit and loss (4.papers)

ratio and proportion (5.papers)

chain rule (5.papers)

time and work (4.papers)

pipes and cisterns (5.papers)

time and distance (5.papers)

problems on trains (8.papers)

boats and streams (7.papers)

partnership (6.papers)

simple interest (4.papers)

compound interest (2.papers)

permutation and combination (3.papers)

clock (2.papers)

calendar (3.papers)

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2

Three pipes X, Y and Z take 20 min, 15 min and 12 min respectively to fill a tanker. Find out the time they will take together to fill the tanker ?

3 min

4 min

5 min

15 min

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3

Two pipes can fill a tank in 10 hours and 12 hours resp. while third pipe empties the full tank in 20 hours. If all the three pipes operate simultaneously, in how much time the tank will be filled?

7 hrs

7 hrs 30 min

9 hrs

15 hrs

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4

A cistern can be filled in 9 hours but it takes 10 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is:

50 hours

60 hours

70 hours

90 hours

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5

One tap can fill a cistern in 2 hours and another tap can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened?

6 hrs

12 hrs

18 hrs

24 hrs

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6

Two pipes A and B can fill a tank in 36 hours and 45 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?

10 hrs

15 hrs

20 hrs

24 hrs

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7

A pipe can fill a tank in 16 hours. Due to a leak in the bottom,it is filled in 24 hours. If the tank is full, how much time will the leak take to empty it ?

24 hrs

48 hrs

72 hrs

none of the above

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8

A cistern is filled by pipe A in 10 hours and the full cistern can be leaked out by an exhaust pipe B in 12 hours. If both the pipes are opened, in what time the cistern is full?

30 hrs

45 hrs

60 hrs

75 hrs

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10

Two pipes A and B can frll a tank in 24 min. and 32 min. respectively. If both the pipes are opened simultaneously, after how much time B should be closed so that the tank is full in 18 minutes?

4 min

6 min

8 min

12 min

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11

Two pipes A and B can fill a tank in 36 min. and 45 min. respectively. A water pipe C can empty the tank in 30 min. First A and B are opened. After 7 minutes, C is opened. In how much time, the tank Is full ?

12 min

36 min

46 min

52 min

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