Question : Anil is 12.5% more efficient than Sachin. If Sachin alone can finish a work in 10 days, then in how many days will Anil alone finish the same work?

Option 1: $\frac{80}{7}$ days

Option 2: $\frac{70}{9}$ days

Option 3: $\frac{80}{9}$ days

Option 4: $\frac{70}{11}$ days

Question : X alone can finish a work in 18 days, and Y alone can finish the same work in 9 days. If X, Y, and Z together can finish the same work in 4 days, then in how many days Z alone can finish the work?

Option 1: 12 days

Option 2: 10 days

Option 3: 14 days

Option 4: 16 days

Question : A1 alone can do a work in 12 days and A2 alone can do the same work in 15 days. With help of A3, they finish the same work in 5 days. In how many days A3 alone can do the same work?

Option 1: 16

Option 2: 20

Option 3: 24

Option 4: 27

Question : A can do a piece of work alone in 40 days. A and B together can do the same work in 10 days. C is 50% less efficient than B. In how many days can A and C together complete the same work?

Option 1: 20 days

Option 2: 24 days

Option 3: 16 days

Option 4: 12 days

Question : Mahesh, Suresh and Raju together can complete a work in 18 days. Mahesh and Suresh together can complete the same work in 72 days. Raju alone can finish the same work in how many days?

Option 1: 21

Option 2: 24

Option 3: 34

Option 4: 18