1) X and Y can do a piece of work in 18 days. Y and Z together can do it in 24 days. if X is 2 times as good a work guy as Z, find in what time Y alone can do it.

A) 10 days

B) 36 days

C) 26 days

D) 30 days

ANS : B) 36 days

2) X,Y,Z together can complete a work in 24 days, X and Z together can do 2 times as much as Y does. Also, X and Y can do 3 times as much as Z does. Find the time taken by each one to complete the work.

A) 72 days

B) 50 days

C) 65 days

D) 44 days

ANS : A) 72 days

3) X does half as much work as Y in (1/3)rd of the time. If together they take 20 days to finish a job, how much days shall Y take to do it?

A) 31 days

B) 45 days

C) 50 days

D) 67 days

ANS : C) 50 days

4) X,Y and Z together can earn money Rs.270 per day while X and Z together earn money Rs.115 and Y and Z together can earn money Rs.167. What is the daily earnings of Z?

A) Rs.12

B) Rs.16

C) Rs.10

D) Rs.20

ANS : A) Rs. 12

5) If 6 guys or 12 girls can do a piece of work in 21 days. Then in how many days 5 guys and 8 girls will do the same work?

A) 7 days

B) 10 days

C) 1 day

D) 14 days

ANS : D) 14 days

6) 6 guys and 4 girls can complete a work in 15 days, while 3 guys and 5 girls complete it in 10 days. Then 15 girls are working alone will complete it in.

A) 14 days

B) 7 days

C) 2 days

D) 3 days

ANS : D) 3 days

7) 1 old man or 2 girls or 3 boys can complete a work in 88 days. 1 old man, 1 girl and 1 boy together will do it in

A) 48 days

B) 86 days

C) 50 days

D) 31 days

ANS : A) 48 days

8) X can do a piece of work in 5 hours, Y in 9 hours and Z in 15 hours. if Z could work with them for 1 hour only, the time taken by X and Y together to complete the work is.

A) 7 hours

B) 2 hours

C) 3 hours

D) 6 hours

ANS : B) 2 hours

9) A particular number of guys finished a piece of work in 80 days. If there were 10 guys more, that could be completed in 10 days less. How many guys were exactly there?

A) 90 guys

B) 55 guys

C) 70 guys

D) 50 guys

ANS : C) 70 guys

10) If 8 boys or 16 girls will complete a piece of work in 25 days. In how many days will take 10 boys and 20 girls to complete it?

A) 10 days

B) 11 days

C) 7 days

D) 15 days

ANS : A) 10 days