1.Niti and Diti can do a piece of work in 45 days and 40 days respectively. They began to work together but Niti leaves after ‘x’ days and Diti finished the rest of the work in (x + 14) days. After how many days did Niti leave? (A)
A. 9
B. 12
C. 11
D. 13
2.A man is twice as fast as a woman and a woman is twice as fast as a boy in doing a work. If all of them, a man, a woman and a boy can finish the work in 7 days, in how many days a boy will do it alone ? (A)
A. 49
B. 7
C. 6
D. 42
3.A single person takes 10 minutes to stitch a bag. If from 10.00 a.m. to 12.30 p.m., 1245 bags are to be stitched how many persons should be employed on this job? (C)
A. 81
B. 82
C. 83
D. 84
4.A farmer can plough a field working 6 hours per day in 18 days. The worker has to work how many hours per day to finish the same work in 12 days ? (B)
A. 7 hours
B. 9 hours
C. 11 hours
D. 13 hours
5.A are great masons and they working alone can build a wall in 10 and 15 days respectively. B is a labourer and he can demolish the same kind of wall in 4 days. If they all start working together, how many days will the wall be either built or demolished completely? (B)
A. The wall will be built in 12 days.
B. The wall will be demolished in 12 days.
C. The wall will be built in 12/5 days.
D. The wall will be demolished in 12/5 days.