11.  A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? 
a.  5 
b.  5(1/2) 
c.  6 
d.  8 
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Answer: (c).6

12.  4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it? 
a.  35 
b.  40 
c.  45 
d.  50 
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Answer: (b).40

13.  A and B can together finish a work 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the work? 
a.  40 
b.  50 
c.  54 
d.  60 
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Answer: (d).60

14.  P can complete a work in 12 days working 8 hours a day. Q can complete the same work in 8 days working 10 hours a day. If both P and Q work together, working 8 hours a day, in how many days can they complete the work? 
a.  5(5/11) 
b.  5(6/11) 
c.  6(5/11) 
d.  6(6/11) 
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Answer: (a).5(5/11)

15.  10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work? 
a.  3 
b.  5 
c.  7 
d.  Cannot be determined 
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Answer: (c).7
