1.  A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is : 
a.  1/4 
b.  1/10 
c.  7/15 
d.  8/15 
View Answer Report Discuss Too Difficult! 
Answer: (d).8/15

2.  A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in: 
a.  9(1/5)days 
b.  9(2/5)days 
c.  9(3/5)days 
d.  10 
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Answer: (c).9(3/5)days

3.  A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day? 
a.  12 days 
b.  15 days 
c.  16 days 
d.  18 days 
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Answer: (b).15 days

4.  A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in: 
a.  20 days 
b.  22(1/2)days 
c.  25 days 
d.  30 days 
View Answer Report Discuss Too Difficult! 
Answer: (b).22(1/2)days

5.  A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C? 
a.  Rs. 375 
b.  Rs. 400 
c.  Rs. 600 
d.  Rs. 800 
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Answer: (b).Rs. 400

6.  If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be: 
a.  4 days 
b.  5 days 
c.  6 days 
d.  7 days 
View Answer Report Discuss Too Difficult! 
Answer: (a).4 days

7.  A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it? 
a.  8 hours 
b.  10 hours 
c.  12 hours 
d.  24 hours 
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Answer: (c).12 hours

8.  A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in: 
a.  15 days 
b.  20 days 
c.  25 days 
d.  30 days 
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Answer: (c).25 days

9.  A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work? 
a.  23 days 
b.  37 days 
c.  37(1/2) days 
d.  40 days 
View Answer Report Discuss Too Difficult! 
Answer: (c).37(1/2) days

10.  A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished ? 
a.  11:30 A.M. 
b.  12 noon 
c.  12:30 P.M. 
d.  1:00 P.M. 
View Answer Report Discuss Too Difficult! 
Answer: (d).1:00 P.M.
