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1. 
Ramesh alone does a piece of work in 4 days and Suresh does it in 12 days. In how many days will the two do it together?
A.
a) 3 days
B.
b) 1.5 days
C.
c) 4 days
D.
8 days
2. 
Pranesh and Sumesh can finish a work in 16 days while Pranesh can do the same work in 24 days. In how many days can Sumesh alone finish the same work?
A.
a) 40 days
B.
b) 25 days
C.
c) 48 days
D.
d) 20 days
3. 
Vinod can do a work in 15 days, Vijay in 25 days and Vinay in 30 days. How long will they take to do the work if they work together?
A.
a) 12 days
B.
7 1/7 days
C.
c) 70 days
D.
d) 20 days
4. 
c) 70 days d) 20 days If A, B and C together can finish a piece of work in 4 days, A alone in 12 days and B in 18 days, then C alone can do it in
A.
a) 21 days
B.
b) 15 days
C.
c) 12 days
D.
d) 9 days
5. 
3 men or 6 women can do a piece of work in 20 days. In how many days will 12 men and 8 women do the same work?
A.
7/2
B.
15/4
C.
c) 5
D.
d) 4
6. 
Some persons can do a piece of work in 12 days. Two times the number of those per- sons will do half of that work in
A.
a) 3 days
B.
b) 4 days
C.
c) 6 days
D.
d) 12 days
7. 
3 men can do a work in 6 days. After 2 days 3 more men joined them. How many days will they take to complete the remaining work?
A.
a) 5 days
B.
b) 4 days
C.
c) 3 days
D.
d) 2 days
8. 
A is twice as good a workman as B and they took 7 days together to do the work. B alone can do it in:
A.
a) 12 days
B.
b) 18 days
C.
c) 21 days
D.
d) 16 days
9. 
A can do a piece of work in 25 days and B can do the same work in 30 days. They work together for 5 days and then A leaves. B will finish the remaining work in
A.
a) 21 days
B.
b) 11 days
C.
c) 20 days
D.
d) 19 days
10. 
An army of 2000 men had enough food to last for 30 days. After 10 days 500 more men joined them. How long did the food last then?
A.
a) 20 days
B.
b) 15 days
C.
c) 12 days
D.
d) 16 days
11. 
Amar can do a piece of work in 15 days. When he had worked for 3 days, Sameer joined him and the remaining work was finished in 8 days. In how many days can Sameer alone fin- ish the whole work?
A.
a) 30 days
B.
b) 27 days
C.
c) 20 days
D.
d) 24 days
12. 
A, B and C can do a piece of work in 18 days, 27 days and 36 days respectively. They start working together. After working for 4 days, A goes away and B leaves 7 days be- fore the work is finished. Only C remains at work from beginning to end. In how many days was the whole work done?
A.
a) 17 days
B.
b) 18 days
C.
c) 16 days
D.
d) 15 days
13. 
A and B can do a piece of work in 6 days. B and C in 4 days and A and C in 5 days. How long will they take to complete the work if they work together?
A.
3.9/37 days
B.
15days
C.
1.23/37days
D.
6.9/37days
14. 
A man, a woman or a boy can do a piece of work in 3,4 and 12 days respectively. How many boys must assist 1 man and 1 women to do the work in 1 day?
A.
a) 5 boys
B.
b) 6 boys
C.
c) 2 boys
D.
d) 20 boys
15. 
Two pipes can fill a tank in 9 hours and 12 hous respectively. In how much time will they fill the tank when opened together? 1 1
A.
3 1/2 hours
B.
5 1/7 hours
C.
c) 5 hours
D.
3 2/3 hours
16. 
A tap can fill a tank in 8 hours and an- other can empty it in 16 hours. If both the taps are opened simultaneously, the time (in hours) to fill the tank is:
A.
8
B.
10
C.
16
D.
24
17. 
A cistern can be filled by a pipe in 15 hours. But due to a leak in the bottom the cis- tern is just full in 20 hours. When the cistern is full, the leak can empty it in:
A.
a) 60 hours
B.
b) 40 hours
C.
c) 45 hours
D.
d) 30 hours
18. 
A cistern can be filled by pipes A and B in 20 hours and 30 hours respectively. When full, the tank can be emptied by pipe C in 60 hours. If all the taps be turned on at the same time the cistern will be full in
A.
a) 10 hours
B.
b) 15 hours
C.
c) 16 hours
D.
d) 30 hours
E.
a) 10 hours
F.
b) 15 hours
19. 
Two pipes A and B can separately fill a tank in 12 minutes and 15 minutes respec- tively. Both the pipes are opend together but 4 minutes after the start, pipe A is turned off. How much time will it take to fill the tank?
A.
a) 11 min
B.
b) 12 min
C.
c) 6 min
D.
d) 8 min
20. 
Two pipes A and B can fill a cistern in 24 minutes and 32 minutes respectively. If both the pipes are opened together, then after how many minutes B should be closed so that the tank is full in 18 minutes?
A.
a) 6
B.
b) 8
C.
c) 1 0
D.
d) 1 2